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Animal Drugs
Animal Devices
Animal Feed
Turtles Under 4 Inches
Vaccines for Animal Diseases
Pharmacies
Practice of Veterinary Medicine
Flea and Tick Products
Milk, Eggs, Meat, and Poultry
Not on the Regulatory Radar

Each week, FDA’s Center for Veterinary Medicine (CVM) receives a variety of phone calls and e-mails from consumers asking questions like, “Who regulates flea and tick products?” and “How do I treat my cat’s urinary tract infection?” While CVM’s Communications Staff is happy to direct consumers to the appropriate resources, it may be helpful to know that FDA is not the only organization responsible for protecting animal health. FDA regulates the drugs, devices, and feed given to or used on the billions of companion and food-producing animals in the U.S. Several other government and non-government organizations also play a role in animal health.

Yes!

Animal Drugs– The Federal Food, Drug, and Cosmetic Act gives FDA the legal authority to approve and regulate drugs for animals. Before a drug company can market an animal drug, the company must get the drug approved by FDA. To get FDA approval, the drug company must prove that:

  • the drug is safe and effective for a specific use in a specific animal species. If the drug is for use in food-producing animals, the drug company must also prove that food products made from treated animals are safe for people to eat;
  • the manufacturing process is adequate to preserve the drug’s identity, strength, quality, and purity. The drug company must show that the drug can be consistently produced from batch to batch; and
  • the labeling is appropriate and truthful. The drug company must make sure that the labeling contains all necessary information to use the drug safely and effectively, including the risks associated with the drug.

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As a little flea, climb up walls & do multiple jumps in the air to reach new platforms & the exit. Flea and Tick Products– FDA regulates some flea and tick products for animals while the Environmental Protection Agency (EPA) regulates others. If a product is regulated by EPA, it will have an. Free unblocked games at school for kids, Play games that are not blocked by school, Addicting games online cool fun from unblocked games.com There Is No Game - Unblocked Games 66 - Unblocked Games for School. Online yard sales probably won’t replace the real thing anytime soon. There's nothing quite like a treasure hunt in the early morning air. But, an online yard sale is a fantastic alternative when it's too cold for traditional yard sales—or when you need a 2 a.m. Vintage shopping fix.

FDA’s role does not stop after an animal drug is approved. As long as the animal drug is marketed in the U.S., FDA continues to monitor:

  • the drug’s safety and effectiveness;
  • the drug’s manufacturing process to make sure quality and consistency are maintained from batch to batch; and
  • how the drug is marketed to make sure the advertisements are truthful and not misleading.

Besides the standard approval process, two additional pathways to the marketplace are available for some animal drugs for minor species or minor uses in a major species. These two pathways are conditional approval and indexing.

For the complete definition of the term “drug,” please see the Federal Food, Drug, and Cosmetic Act at Section 201(g) [21 U.S.C. 321].

For more information about the animal drug approval process, please visit:

For an online database of FDA-approved animal drugs, please see Animal Drugs @ FDA

For more information about minor species, minor uses, conditional approval, and indexing, please visit:

Animal Devices– The key difference between an animal device and an animal drug is how the product works. If it relies on a chemical action occurring in or on the animal’s body to work, the product is a drug, not a device. If it needs to be metabolized by the animal’s body to work, the product is a drug, not a device.

Antibiotics, anesthetics, and insulin are examples of drugs. Needles, syringes, surgical instruments, X-ray equipment, certain diagnostic test kits, and dental appliances are examples of devices.

Unlike animal drugs, animal devices do not have to be approved by FDA before they can be marketed. Manufacturers and distributers of animal devices are responsible for making sure they are safe, effective, and properly labeled. FDA has the authority to take regulatory action if an animal device is adulterated or misbranded.

For the complete definition of the term “device,” please see the Federal Food, Drug, and Cosmetic Act at Section 201(h) [21 U.S.C. 321].

For more information about animal devices, please visit: How FDA Regulates Animal Devices

Animal Feed– The Federal Food, Drug, and Cosmetic Act requires food for both people and animals to be:

  • safe;
  • produced under sanitary conditions; and
  • properly labeled.

Animal feed includes pet food and pet treats, as well as feed for food-producing animals, such as cattle, pigs, chickens, and farmed-raised fish. Unlike animal drugs, animal feed does not have to be approved by FDA before it can be marketed. However, FDA makes sure the ingredients in the feed are safe and have an appropriate function, and many ingredients must be approved by FDA before they can be used in animal feed. FDA also evaluates the human food safety aspect of animal feed for food-producing animals. That is, FDA makes sure it’s safe for people to eat food products made from animals that ate the feed.

For more information about animal feed, please visit: Animal Food & Feeds

Turtles Under 4 Inches– Under federal law, FDA banned the sale of turtles less than 4 inches long in 1975 because of human health concerns. Small turtles may seem like fun additions to the home, but they carry dangerous bacteria called Salmonella.

For more information about turtle safety, please visit: Pet Turtles - A Source of Germs

No!

Vaccines for Animal Diseases– FDA does not regulate vaccines for animal diseases. Veterinary biologics, including vaccines for animal diseases, are regulated by the U.S. Department of Agriculture.

For more information about vaccines for animal disease, please visit: Veterinary Biologics (USDA)

Maybe So!

Pharmacies– Pharmacists are licensed by their state board of pharmacy and must follow the rules and regulations of that state board. FDA is responsible for approving and regulating the drugs sold in pharmacies. Some pharmacies also compound drugs. FDA has rules and policies about compounding drugs that apply to those pharmacies.

For more information about boards of pharmacy and for contact information for each state board of pharmacy, please visit the website of the National Association of Boards of Pharmacy (NABP)

For more information about the compounding of animal drugs, please visit: Compounding of Animal Drugs

Please refer questions about a specific drug for your animal or drug pricing to your veterinarian or pharmacist.

Practice of Veterinary Medicine– Veterinarians are licensed by their state veterinary licensing board and must meet the requirements of the licensing board to practice in that state. FDA regulates the devices and drugs that veterinarians use, and the conditions under which veterinarians may prescribe drugs for extra-label uses.

What does “extra-label” mean?
When an approved drug is used in a manner other than what is stated on the label, it is an extra-label use. This is commonly called an “off-label” use because the drug is used in a way that is “off the label.”

For more information about veterinary licensing boards and for contact information for each state veterinary licensing board, please visit the website of the American Association of Veterinary State Boards (AAVSB).

For more information about extra-label drug use in animals, please visit:

Please refer specific questions about your animal’s health to your veterinarian.

Flea and Tick Products– FDA regulates some flea and tick products for animals while the Environmental Protection Agency (EPA) regulates others. If a product is regulated by EPA, it will have an EPA Registration Number (sometimes written as “EPA Reg. No.”) on the label. If a product is regulated by FDA, it will typically have the statement “Approved by FDA” followed by a six-digit New Animal Drug Application (NADA) or Abbreviated New Animal Drug Application (ANADA) number on the label.

For more information about flea and tick products, please visit:

Milk, Eggs, Meat, and Poultry– The responsibility of food safety is shared by FDA and the U.S. Department of Agriculture (USDA). FDA regulates milk and milk products, such as cheese, cream, and ice cream. FDA also regulates “shell eggs” which, as the name implies, are eggs still inside their shells. USDA regulates “egg products” which are eggs that have been removed from their shells for processing. In general, USDA regulates meat and poultry.

For more information about food and food safety, please visit:

Site

Not on the Regulatory Radar

Some products on the market for animals don’t fall under the regulatory authority of any government or non-government organization, including:

  • Cat litter
  • Pet accessories, such as toys, beds, and crates
  • Grooming aids
  • Bedding for pet birds and small animals, such as rabbits, guinea pigs, and hamsters

For questions or concerns about FDA-regulated animal products, contact CVM’s Communications Staff at:

Phone: 240-402-7002
Fax: 240-276-9115
E-mail: [email protected]
Address: 7519 Standish Place
Rockville, MD 20855

Pests in Gardens and Landscapes

Ground Squirrel

Revised12/18

In this Guideline:


California ground squirrel burrow opening under a structure.

A pair of box-type gopher traps modified and set in the runway of ground squirrels.

Conibear trap set at the base of a structure to trap ground squirrels.

Ground squirrels are troublesome rodent pests for many home gardeners. The California ground squirrels, Otospermophilus beecheyi and Otospermophilus douglasii, are the most common species in and around homes and gardens. The two are usually not referred to as separate species, so in this publication they are referred to as “California ground squirrel” or simply “ground squirrel.”

The California ground squirrel is found throughout most of California and extends south into the northwestern part of the Baja peninsula. It is also found in western Nevada and can be found north of the Columbia River in south central Washington and throughout western Oregon.

The California ground squirrel can invade and colonize residential areas that have open grassy areas, sometimes causing considerable damage.

Although California ground squirrel populations generally thrive where the winters are mild, there are known populations in the central Sierra Nevada Mountains at altitudes of over 7,000 feet.

IDENTIFICATION

It is easy to identify ground squirrels since they forage above ground near their burrows. Their body measures 14 to 20 inches, which includes their tail. Adult squirrels weigh between 21 and 30 ounces. Don't escape 2clout games free online games. The males are somewhat larger than the females.

Ground squirrel fur is mottled brown, with some white and gray markings on the back. Their belly and underside have a combination of lighter browns, grays, and white. California ground squirrels have a white ring around each eye. Their tails are somewhat bushy (but less so than those of tree squirrels) and their ears are erect and conspicuous.

Although ground squirrels look similar to tree squirrels and can climb trees, when frightened they generally will retreat to a burrow, whereas tree squirrels will climb a tree or tall structure and never use a burrow. For information about tree squirrels, see the UC IPM Pest Notes: Tree Squirrels.

BIOLOGY AND BEHAVIOR

California ground squirrels live in colonial burrow systems where they sleep, rest, rear young, store food, and avoid danger. Their burrows are about 4 inches in diameter, although older burrow entrances can occasionally be quite a bit larger. The length of burrow systems usually ranges between 5 and 30 feet. Most burrow systems are within 2 to 3 feet of the surface of the ground, but they may occasionally be up to 6 feet or more in depth. Burrows can be single tunnels or complex branching systems. They may be occupied by a single squirrel or occupied by many.

California ground squirrels are active during the day, mainly from midmorning through late afternoon, especially on warm, sunny days. They have two periods of dormancy during the year. During winter months, most ground squirrels hibernate, but some young can be active at this time, particularly in areas where winters aren't severe.

During the hottest times of the year, most adults go into a period of inactivity, called estivation, that can last a few days to a week or more. During these periods, the burrow appears open at the entrance, but the squirrel plugs it with soil near the nest.

The onset of breeding in California ground squirrel populations can vary depending on weather, elevation, and latitude. Generally, populations at higher altitudes and in colder climates hibernate for longer periods and therefore breed later. Mating can start as early as January in warmer locations and continues until July. Peak mating occurs from March through June.

California ground squirrels only produce a single litter per year. The average litter has 5 to 8 young, but litters as small as 1 and as large as 15 have been observed. The young are born in the burrow and grow rapidly, emerging from the burrow when they are about 6 weeks old. At 6 months of age, they resemble adults.

Ground squirrels are primarily herbivorous, and their diet changes with the season. After emerging from hibernation, they feed almost exclusively on green grasses and herbaceous plants. When annual plants begin to dry and produce seed, squirrels switch to seeds, grains, and nuts, and begin to store food.

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Ground squirrels usually forage close to their burrows. Their home range typically is within a 75-yard radius of their burrow.

DAMAGE

Ground squirrels damage many food-bearing and ornamental plants. Particularly vulnerable are grains, as well as nut and fruit trees such as almond, apple, apricot, avocado, orange, peach, pistachio, prune, and walnut.

In gardens, ground squirrels will eat vegetables in the seedling stage. They can damage young shrubs, vines, and trees by gnawing bark, girdling trunks (completely removing a strip of bark from a tree's outer circumference), eating twigs and leaves, and burrowing around roots. Ground squirrels will gnaw on plastic sprinkler heads and irrigation boxes and lines.

Burrowing can be quite destructive. Burrows and mounds make it difficult to mow lawns and other grassy areas, and they present hazards to machinery, pedestrians, and livestock. Burrows around trees and shrubs can damage and dry out roots; this can sometimes topple trees. Burrowing beneath buildings and other structures sometimes produces damage that necessitates costly repair.

Ground squirrels can harbor diseases harmful to humans, particularly when squirrel populations are high. A major concern is bubonic plague, caused by the bacterium Yersinia pestis and transmitted to humans, pets, and other animals by fleas associated with the squirrels. Ground squirrels are susceptible to plague, which has wiped out entire colonies. If you find unusual numbers of squirrels or other rodents dead for no apparent reason, notify public health officials. Do not handle dead squirrels under these circumstances.

LEGAL STATUS

The California Fish and Game Code classifies ground squirrels as nongame mammals. An owner or tenant can control (“take”), in any legal manner, nongame mammals that are injuring growing crops or other property. Some species of tree squirrels, on the other hand, are classified as game animals (with a hunting season) that cannot be taken without a permit. See the Pest Notes: Tree Squirrels for more information.

No license is required for the management of California ground squirrels if it is the owner or tenant who is taking damaging ground squirrels. A trapping license from the California Department of Fish and Wildlife is required for those who are trapping squirrels for hire or profit.

The U. S. Fish and Wildlife Service classifies the Mohave ground squirrel, S. mohavensis, and the San Joaquin antelope squirrel, Ammospermophilus nelsoni, as threatened species. Therefore, both are protected animals. Although you are unlikely to mistake either of these relatively small squirrels for the much larger California ground squirrel, their ranges could overlap in some areas, so ensure proper identification before instituting control measures.

The endangered San Joaquin kit fox (Vulpes macrotis mutica), several endangered species of kangaroo rats (Dipodomys spp.), the riparian brush rabbit (Sylvilagus bachmani riparius), the riparian wood rat (Neotoma fuscipes riparia), and some endangered amphibians and reptiles also are within the California ground squirrels' range, so some squirrel management techniques could impact them as well. If the kit fox is found in your county, contact your county agricultural commissioner for additional information. For a range map, see the California Department of Pesticide Regulation's website (listed in References).

Before using pesticides for ground squirrel management, read the product label to determine if any restrictions exist on rodent control within the ranges of these and other endangered and protected animals.

MANAGEMENT

Effective management depends heavily upon understanding the unique life cycle and behavior of the California ground squirrel. For example, baiting with treated grain is effective in summer and fall, because squirrels primarily feed on seeds during this period. Burrow fumigation is most effective in spring, when moist soil helps seal gasses in the burrow system. Fumigating at this time is also more effective in reducing ground squirrel numbers since squirrels die before they can reproduce.

Table 1 shows the yearly activities of the California ground squirrel and times when baiting, trapping, fumigation, and other management practices are generally most effective.

Table 1. Seasonal activity, diet and, optimum timing for management of California ground squirrels.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
Activity periods
Adult activityMating
Juvenile activity
Feeding
DietGreen ForageSeeds
Management method and window
FumigationHigh efficacy
Toxic baitsHigh efficacy
TrappingModerate efficacy
Burrow mod.Moderate efficacy
ShootingModerate efficacy
Habitat mod.Low efficacy
Biological controlLow efficacy
ExclusionLow efficacy
RepellentsLow efficacy
Management Window
Hibernation/Management ineffective

Note: ground squirrel activity may vary by region. This variance may affect management windows.

Habitat Modification

You'll generally find ground squirrels in open areas, although they sometimes use brush and other vegetation as cover during retreat. Remove brush piles and debris to make an area less desirable in this way. Brush removal also aids in detecting squirrels and their burrows and improving access during management operations. California ground squirrels generally dislike dense vegetation, as it prevents their easy detection of potential predators. Therefore, avoiding mowing and grazing can discourage ground squirrel incidence. Keep in mind, however, that increasing the amount of vegetation in an area may encourage other pest species, like California field voles.

Ground squirrels can reinvade a site by moving into vacant burrows. Although not usually possible in urban areas, destroying old burrows by deep ripping them to a depth of at least 20 inches, using a tractor and ripping bars, can slow reinvasion. Simply filling in the burrows with soil does not prevent reinvasion, as ground squirrels easily find and reopen old burrows.

Trapping

Traps are practical for management when squirrel numbers are low to moderate. Live-catch traps are not often recommended, because they present the problem of animal disposal. It is illegal to relocate wildlife in the State of California without a permit. Live-captured ground squirrels must be released immediately on the property where they were caught, or they must be euthanized by legal and humane measures. Methods of euthanasia considered humane by the American Veterinary Medical Association include gassing with carbon dioxide and shooting. Drowning is not an approved method of euthanasia and is illegal in California (See References).

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There are several types of traps that kill ground squirrels, including box traps, tunnel traps, and Conibear traps. For box traps and tunnel traps, place them on the ground near squirrel burrows or runways, and bait them with walnuts, almonds, oats, barley, melon rinds or any other food source that the ground squirrels are eating. Place the bait well behind the trigger or tied to it. After you bait traps, place them out with triggers unset for several days so the squirrels can become accustomed to them. After the squirrels are used to taking the bait, rebait and set the traps.

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To reduce hazards to children, pets, poultry, and nontarget wildlife, place box-type traps inside a covered box with a 3-inch-diameter entrance. Put the box near active burrows with signs of recent diggings. Inactive burrows will be filled with leaves or old straw, or have cobwebs across the entrance.

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The Conibear trap No. 110 with a 4 1/2-by 4 1/2-inch jaw spread also is an effective kill trap. You can bait the wire trigger, but usually you'll want to leave it unbaited. Place the trap directly in the burrow opening, so the squirrel must pass through it, tripping the trigger.

It might be necessary to use soil to partially fill in the burrow entrance around the outer edges of the trap to prevent the squirrel from slipping around the outside of the trap. Closing all other burrows with soil might hasten success by directing the squirrel to the remaining open burrow, which contains the trap.

Attach the Conibear trap to a stake to prevent a scavenger from carrying off both it and the squirrel. With this type of trap, leaving the trap baited but unset has little effect on trapping success.

Inspect traps at least once a day and remove dead squirrels. Don't handle the carcasses without protective gear. You can use a plastic bag slipped over each hand and arm as a glove. Once you have removed the squirrel from the trap, hold the animal with one hand and turn the bag inside out while slipping it off your arm and hand.

Keep small children and pets out of the area while traps are in use. In kit fox areas, spring all Conibear traps before nightfall and reset them the following morning. Also, be mindful of nontarget species in the area (e.g., cats, wildlife) to avoid their inadvertent capture or harm when trapping.

Fumigation

Burrow fumigation can be a safe method for managing ground squirrels. Fumigation is most effective in spring, or at other times when soil moisture is high. Moist soil helps contain the gas within the burrow system or may be required to properly activate certain fumigants (e.g. aluminum phosphide). Do not fumigate in summer or when the soil is dry, because the gas more readily diffuses into small cracks present in dry soil, making it less effective. Do not fumigate during hibernation, because the ground squirrel plugs its burrow with soil, preventing fumes from reaching the nest chamber. You cannot see this plug by examining the burrow entrance.

As with any pesticide, read and follow label instructions, with particular regard for nontarget species and safety factors. Fumigants have restrictions that require products to be applied only within burrows that are greater than a certain distance from structures that may be occupied. Read the product label to determine the application distance requirements pertaining to your site.

Be aware of the signs of nontarget species inhabiting inactive ground squirrel burrows. Kit foxes will use an old burrow, enlarging the opening, and often creating a keyhole-shaped entrance. Active pupping dens might contain prey remains, droppings, and matted vegetation, and show signs of fresh paw prints. The burrowing owl (Athene cunicularia) is another potential occupant of abandoned ground squirrel burrows.

Do not treat a burrow if you suspect a nontarget animal is present. Fumigate only active ground squirrel burrows. County agricultural commissioners can provide additional information on how to recognize nontarget burrows.

The most readily available fumigant for most residential users is the gas cartridge. Some county agricultural commissioners' offices sell United States Department of Agriculture gas cartridges, which are designed for fumigating burrowing rodents. Other types of fumigation cartridges are also available at retail outlets.

Instructions for the use of gas cartridges are product-specific, soit is very important to consult the product label before use. Generally, to use a gas cartridge, puncture the cartridge cap and insert a fuse into the puncture hole. Place the cartridge into an active burrow entrance with the fuse pointing towards the interior of the burrow. Light the fuse and push the cartridge into the burrow with a shovel handle. Immediately seal and tightly pack the burrow opening with soil, but don’t cover the cartridge itself with soil. Multiple entrances to the same burrow system do not necessarily need to be treated separately, but it is important to seal any additional openings. Use the smoke escaping from the burrow to identify these entrances. Larger burrow systems, however, may require two or more cartridges. After 24 hours, check for reopened burrows, and re-treat as needed.

Aluminum phosphide is another burrow fumigant that is very effective as a ground squirrel management tool. However, its use is restricted to licensed pest management professionals. Additionally, it cannot be used within 100 feet of any structure that is, or may potentially be, occupied by humans, pets, or livestock. This eliminates its use from most residential areas.

Pressurized exhaust systems that inject concentrated carbon monoxide into burrow systems are also legal for use in California. Of these devices, the Pressurized Exhaust Rodent Controller (PERC) machine has been extensively tested and has proven to be effective for the management of California ground squirrels. Devices that produce carbon dioxide for burrow fumigation are currently seeking registration in California and may be available soon. As with all burrow fumigation applications, these devices will be most effective under moist soil conditions.

Toxic Baits

Anticoagulant rodenticide options for residential use are limited to first-generation active ingredients such as diphacinone. These products must be applied in tamper-resistant bait stations, usually within a specified distance from a manmade structure. Check product labels for specific distances and application rates.

Diphacinone and other first-generation anticoagulant rodenticides (FGARs) are considered multiple feeding toxins, meaning that a ground squirrel must feed on the bait multiple times over several days to ingest a toxic dose. FGARs have low primary toxicity concerns (that is, mortality of nontarget wildlife that directly consume the toxicant), partly because they require multiple feedings to acquire a toxic dose and also because FGARs can be applied in bait stations that are not generally accessible to nontarget species.

If bait is accessible to nontarget species, then alternative management options must be considered. Anticoagulants are the only rodenticide type registered in the United States which has an antidote available to reverse the effects.

FGAR baits generally require two to four weeks or more to control populations. Continue baiting until all feeding ceases and you no longer see any squirrels. Although few ground squirrels will die above ground, you should pick up and dispose of those that do, as described above in the Trapping section and in accordance with label directions. Also, be sure to pick up and dispose of unused bait upon completion of the management program, according to label instructions.

Toxic grain baits containing the active ingredient zinc phosphide can only be applied by licensed pest management professionals and are not available for use by residential users for ground squirrel management. Rodenticide products labeled for use against rats and house mice should never be used for the management of ground squirrels unless ground squirrels are specifically listed on the label as a target species.

Other Management Techniques

Shooting. Shooting squirrels with small caliber rifles can provide some ground squirrel control, but it is very time-consuming. Additionally, discharging a firearm is not legal in most municipalities.

The California Department of Fish and Wildlife (CDFW) has prohibited the use of lead projectiles in some firearms within the range of the California condor. Likewise, leaving lead projectiles behind (within animal carcasses) can be hazardous since it may result in their ingestion by scavengers. Currently, the use of lead ammunition is permitted for take of small nongame animals such as ground squirrels. However, effective July 1, 2019, nonlead ammunition will be required when taking any wildlife with a firearm anywhere in California.

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Frightening devices. There are no effective squirrel-frightening devices or repellents that will cause ground squirrels to leave their burrows or avoid an area or crop.

Burrow exploders. Devices that inject ignitable gasses into ground squirrel burrow systems are not generally recommended for urban use and have not proven to be effective.

Biological control. Many predators, including hawks, eagles, rattlesnakes, and coyotes, eat ground squirrels. In most cases, predators are not able to keep ground squirrel populations below the level at which they become pests for the home gardener. Dogs might prevent squirrels from entering small areas, but they cannot manage established squirrel populations.

Follow-up

For those who live next to wildlands or other areas where squirrels are common, an ongoing management program will be necessary, since squirrels will reinvade over time. Once you have controlled a ground squirrel problem, periodically monitor the area for reinfestation. Check for new burrows and start management actions as soon as you notice new arrivals. It is easier and less expensive to manage a small population rather than to allow it to build up to larger numbers.

More detailed information about identification, management, and other resources is available at the UC Ground Squirrel Best Management Practices website.

REFERENCES

American Veterinary Medical Association euthanasia guidelines(PDF). (Accessed November 19, 2018.)

Baldwin RA, Meinerz R. 2016. Assessing the efficacy of carbon monoxide producing machines at controlling burrowing rodents. University of California, Davis. Final Report to CDFA.

California Department of Fish and Wildlife licensing website. (Accessed November 19, 2018.)

California Department of Pesticide Regulation. 1995. Protecting Endangered Species: Interim Measures for San Joaquin Kit Fox(PDF). Sacramento: Pesticide Registration Branch, Pesticides and Toxic Substances(PDF) H-7506. 13 pp. (Accessed October 15, 2018.)

Marsh RE. 1994. Belding's, California, and Rock Ground Squirrels. In Hygnstrom SE, Timm RM, Larson GE (eds.). Prevention and Control of Wildlife Damage. Vol. 1. Lincoln: University of Nebraska Cooperative Extension.

Salmon TP, Whisson DA, Marsh RE. 2006. Wildlife Pest Control around Gardens and Homes,2nd ed. UC ANR Publication 21385. Oakland, CA.

Smith JE, Long DJ, Russell ID, Newcomb KL, Muñoz, VD. 2016. Otospermophilus beecheyi (Rodentia: Sciuridae). Mammalian Species 48(939):91–108.

Yensen E, Sherman PW. 2003. Ground squirrels. Feldhamer GA, Thompson BC, Chapman JA (eds.). Wild mammals of North America: biology, management, and conservation 2nd ed. Johns Hopkins University Press. Baltimore, Maryland.

PUBLICATION INFORMATION

Pest Notes: Ground Squirrel (formerly titled California Ground Squirrel)

UC ANR Publication 7438

Authors:Niamh M. Quinn, UC Cooperative Extension, San Diego, Orange, and Los Angeles Counties and South Coast Research & Extension Center; Monica J. Dimson, UC Cooperative Extension, Orange County; Roger A. Baldwin, Dept. of Wildlife, Fish, and Conservation Biology, UC Davis.

TECHNICAL EDITOR: K Windbiel-Rojas

ANR ASSOCIATE EDITOR: AM Sutherland

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EDITOR: B Messenger-Sikes

Produced by University of California Statewide IPM Program

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