Related by context. Frequent words. (Click for all words.) 53 Sea otters 52 amphibian species 51 Greater Yellowstone Ecosystem 51 Galapagos islands 51 aquatic invertebrates 51 pygmy rabbits 50 yellow legged frog 50 amphibian populations 50 avian species 50 amphibians 50 species 49 jaguarundi 49 Kirtland warbler 49 frogs toads 49 red legged frogs 49 Biological Conservation 48 vertebrate species 48 tiger salamander 48 aquatic habitats 48 montane 48 Yellowstone cutthroat trout 48 migratory bird species 47 Puget Sound orcas 47 Gunnison sage grouse 47 freshwater mussels 47 frog species 47 Invasive plants 47 Magellanic penguins 47 mammals reptiles 47 Galápagos 47 snowy plover 47 pikas 46 grassland birds 46 habitats 46 marbled murrelets 46 lowland forests 46 snowy plovers 46 federally endangered 46 insects spiders 46 chytrid fungus 46 petrels 46 eiders 46 biodiversity hotspot 46 murrelet 46 pine marten 45 overhunting 45 leatherback turtles 45 fairy shrimp 45 Florida panthers 45 kangaroo rats 45 bird species 45 pygmy owl 45 chytrid 45 marine iguanas 45 pupfish 45 deciduous forests 44 reptiles amphibians 44 marbled murrelet 44 wetland ecosystems 44 amphipods 44 waterbird 44 black footed ferret 44 mammals 44 federally endangered species 44 habitat 44 coral species 44 larval stages 44 wood stork 44 freshwater ecosystems 44 monk seal 44 parasitic wasp 44 lowland gorillas 44 El Yunque 44 desert tortoises 44 molluscs 44 orchid species 44 Leatherbacks 43 amphibian 43 mussel species 43 habitat fragmentation 43 Mexican spotted owl 43 bog turtles 43 Iberian lynx 43 Galápagos Islands 43 Spotted Owl 43 apex predators 43 terrestrial ecosystems 43 invertebrate species 43 damselfish 43 vertebrate animals 43 frogs 43 gharials 43 habitat degradation 43 wintering birds 43 Wadden Sea 43 gastropods 42 Chihuahuan Desert 42 sagebrush habitat 42 White Nose Syndrome 42 scrub jays 42 flatworms