英文關鍵字
animal
architecture
arrive
beak
bill
bird
brood
builder
building
chooses
city
clay
collecting
construction
countryside
cup
delichon
europe
european
flight
flock
fly
further
ground
holds
house
its
martin
material
migratory
moist
mud
muddy
nest
pellet
pick
place
plaster
pond
posterity
puddle
saliva
social
spit
street
swallow
synanthrope
town
urban
urbica
urbicum
village
water
wet
wildlife
work
worker