All wildlife is regulated by a combination of state and federal agencies. In California, the main agencies are the California Department of Fish and Game and the U.S. Fish and Wildlife Service. While the regulations differ according to taxonomic group, species, and status (e.g., threatened/endangered), it is generally illegal to live-trap, collect, or salvage wildlife without a permit. However, the MVZ maintains permits that allow donations of lawfully acquired wildlife, including specimens that are found dead, for scientific and educational purposes.

Unfortunately, animals are found dead in a variety of circumstances that range from hitting windows or cars to death by disease. The Museum welcomes donations of such specimens, especially those that are fairly fresh, because they can provide valuable additions to the collections. Any person who handles a dead animal should be aware of potential health hazards. If a person picks up a dead animal (amphibian, reptile, bird, or mammal), they should contact a MVZ Curator to see whether the Museum is interested in the specimen and to make arrangements for donating the carcass. Any specimen that is found dead should be placed in a plastic bag (preferably a freezer bag) and clearly labeled with (a) the location and date where the specimen was found, (b) the circumstances under which the specimen was found (e.g., dead on road), and (c) the person's name, address, phone number, and email address. The specimen should then be frozen (regular freezer at -20 C) until arrangements can be made to bring it to the Museum.