Collocations for bird - noun

wild
caged
exotic, rare
common
endangered
game
predatory
migratory
native
aquatic, forest, grassland, land, marine, sea (usually seabird), tropical, wading, woodland
Seabirds flocked above our heads.

song (usually songbird)
backyard (AmE), garden (BrE)
pet
breeding, nesting
flightless
adult, baby
extinct

flock

circle, flit, fly, glide, soar, swoop, swoop down
We watched a bird of prey swoop down on a mouse.

hop
flap its wings, flutter
land (on sth)
A bird landed on my shoulder.

perch on sth
flock
migrate
The birds migrate in September.

chirp, sing, twitter, warble
peck
birds pecking at the corn

feed on sth
build a nest, nest
birds nesting on the roof of the church

breed, lay eggs
moult/molt

species
call, song (usually birdsong)
bird's nest
sanctuary
conservation
habitat
life
an area with a very varied bird life

population
watcher, watching (usually birdwatcher, birdwatching)
enthusiast, lover
feeder
table (BrE)
They set up a bird table in the garden.

bath
cage (usually birdcage)
seed (usually birdseed)
droppings, poo (BrE,informal), poop (AmE,informal)
feathers
dog (= used in hunting)
flu
strike (= when a bird hits a plane)

a bird of passage (= a migratory bird), a bird of prey
a breed of bird, a species of bird, a type of bird