Related by context. Frequent words. (Click for all words.) 53 endangered species 52 northern spotted owl 51 endangered 51 Endangered Species Act 48 spotted owl 46 species 45 black tailed prairie 45 delta smelt 45 Endangered Species List 44 bull trout 44 penguin species 44 overhunting 44 sage grouse 44 habitat designation 43 Endangered species 43 red legged frog 43 Mexican gray wolf 43 FWS 43 spotted owls 42 Threatened Species 42 amphibian species 42 Steller sea lions 42 imperiled 42 Delta smelt 42 Grizzly bears 42 Endangered Species 42 polar bears 41 overharvesting 41 polar bear 41 desert tortoises 41 desert tortoise 41 California condor 41 Mexican gray wolves 41 mountain pine beetles 41 habitat 41 sea otters 41 Endangered 41 mammal species 40 whitebark pine 40 critically endangered 40 endangered species protections 40 Critically Endangered 40 endangered salmon 40 imperiled species 40 amphibian 39 subspecies 39 bald eagle 39 gray wolf 39 vertebrate species 39 IUCN Red 39 pika 39 black footed ferrets 38 Burmese pythons 38 coral species 38 Polar bear 38 Environmental Responsibility PEER 38 sawfish 38 overfished 38 Overfishing 38 barred owl 38 chytrid fungus 38 critically endangered species 38 grizzlies 38 federally protected 38 loggerhead sea turtles 38 lynx 38 gopher tortoise 38 extinct 38 burrowing owl 38 mammals 38 black footed ferret 38 Wildlife Service 37 brown pelican 37 wolf populations 37 California condors 37 sage grouse habitat 37 lesser prairie 37 gopher tortoises 37 prairie chicken 37 woodland caribou 37 Species 37 extinction 37 Biological Diversity 37 pallid sturgeon 37 genetically distinct 37 species extinctions 37 breeding pairs 37 Bluefin tuna 37 coho salmon 37 walruses 37 manatee 37 sea otter 36 mammal 36 plover 36 wolves 36 polar bear populations 36 wild salmon 36 grizzly bears 36 hatchery fish 36 Grizzly bear 36 habitat degradation