英文關鍵字
animal
aves
bank
beach
bird
birdhouse
burrow
cliff
cluster
colony
entrances
excavate
flying
green
group
hole
house
landscape
life
many
martin
much
multitude
natural
nature
nest
nobody
ornithology
outdoors
peninsula
quantity
reproduction
riparia
riparian
ripariariparia
river
riversid
sand
sandmartin
sandy
snest
soil
spring
steep
swallow
swallows
the
wild
wilderness
wildlife