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animal
avian
baby
barn
beak
bird
birdhouse
birdnest
black
breed
build
care
city
clay
common
definition
delichon
domestic
europe
fauna
feather
feeding
fight
fighting
flight
flock
full
garden
high
hirundinidae
house
july
martin
martins
migratory
nature
nest
nestling
ornithology
passerine
play
plumage
roof
spring
summer
swallow
tail
urban
urbica
urbicum
wall
wild
wildlife
wing