California Department of Fish and Wildlife

Threats to Wildlife

Habitat Loss and Modification

Biological Threats

Free-ranging and Feral Cats

Free-ranging Dogs

Problems with Bird Feeders

Feeding Wild Animals

Human Harassment of Wildlife

  • Birds, North American Nature Photographers Association and American Birding Association
  • Large Mammals, Etiquette For Wildlife Observers and Photographers, Grand Teton National Park
  • Large Mammals, Wildlife Safety Guide, Bear Country
  • Marine Mammals, Guide to Responsible Wildlife Watching, The Alliance of Marine Mammal Parks and Aquariums
  • Watchable Wildlife, Colorado Department of Wildlife

Moving Fish, Wildlife, and Plants

Invasive, Nuisance and Exotic Species: Birds, Mammals and Reptiles

Non-Native Invasive Species: General Information, Plants, Aquatic Animals