Related by context. Frequent words. (Click for all words.) 51 hatchings 49 periodical cicadas 47 occurrences 47 outbreaks 45 avian species 45 insect populations 45 bird migrations 45 screech owls 45 winged insects 45 infestations 45 insects 44 Brood X 44 faunal 44 cicadas 44 sexual dimorphism 43 Infestations 43 roosts 43 bamboo flowering 43 epidemics 43 stoneflies 42 katydids 42 eagle nests 42 ash borers 42 tree swallows 42 pine siskins 42 mating rituals 42 mayflies 42 cicada 42 infestation 41 extinctions 41 stinkbugs 41 pronghorns 41 damselfly 41 White Nose Syndrome 41 hibernating 41 parasitic wasps 41 bald eagle nests 41 whitefly 41 sightings 40 influenza epidemics 40 circadian clocks 40 dragonflies 40 amphibian populations 40 Sandhill cranes 40 roosting 40 mating ritual 40 nestlings 40 diurnal 40 red winged blackbird 40 moths 40 mammal 40 occurrence 40 Migrating birds 39 Cambrian explosion 39 phenomena 39 arthropods 39 emergence 39 spottings 39 phenology 39 glaciations 39 overwintering 39 swarms 39 meteor showers 39 prolonged droughts 39 winged creatures 39 skunk cabbage 39 ehrlichiosis 39 terrestrial ecosystems 39 nocturnal creatures 39 abundances 39 species 39 resurrections 39 flocks 39 insect 39 butterflies 39 convergent evolution 38 native pollinators 38 adelgids 38 upwellings 38 inhabitation 38 snowy owls 38 Cicadas 38 auroral 38 pileated woodpeckers 38 egg laying 38 garter snakes 38 mammals 38 carnivorous plants 38 wintering birds 38 bumble bees 38 Fruit flies 38 Midges 38 clusters 38 harbor porpoises 38 predation 38 moth 38 nesters 38 calamities 38 oscillations 38 rufous 38 Sightings