Related by context. Frequent words. (Click for all words.) 64 predation 58 Predation 55 nestlings 54 mammary tumors 54 goshawks 54 cowbirds 54 sexual dimorphism 54 habitat fragmentation 54 yellowjackets 53 insect populations 53 cowbird 53 Mule deer 52 corticosterone 52 lapwings 52 nesting birds 52 petrels 52 overwintering 52 redpolls 52 mongooses 52 black capped chickadees 52 kittiwakes 52 snowshoe hares 52 cottontail rabbits 52 overhunting 51 amphibian populations 51 habituation 51 chytrid 51 goshawk 51 quolls 51 hen harrier 51 pine marten 51 ungulates 51 stoats 51 Culex mosquitoes 50 overharvest 50 blue tits 50 species 50 grassland birds 50 bitterns 50 breeding colonies 50 avian species 50 fox squirrels 50 grassland habitat 50 Toxoplasmosis 50 snowy plovers 50 backyard feeders 50 mammals 50 nesting habitat 50 Invasive plants 50 Stink bugs 50 nests 49 Greater Yellowstone Ecosystem 49 pygmy owl 49 overbreeding 49 Sage grouse 49 bobolinks 49 mortalities 49 habitat degradation 49 whoopers 49 anaplasmosis 49 Infestations 49 foraging 49 Toxoplasma gondii 49 milder winters 49 habitat 49 echidnas 49 northern spotted owls 49 forbs 49 lapwing 48 Yellowstone ecosystem 48 wolf predation 48 nesting 48 golden plover 48 varroa mites 48 Sea otters 48 tent caterpillars 48 wintering birds 48 Feral hogs 48 bird species 48 wood stork 48 populations 48 sagebrush habitat 48 Aedes aegypti 48 migratory bird species 48 translocations 48 gastropods 48 habitats 48 Inbreeding 48 genetic variability 48 parasitoids 48 shearwaters 48 Anopheles 48 plovers 48 racoons 47 deer ticks 47 predators 47 timber rattlesnake 47 unwanted litters 47 flea beetles 47 lynxes 47 stoat