英文關鍵字
anas
animals
avian
biology
bird
city
crowding
ducks
dusk
ecology
education
environmental
extraordinary
feed
flock
fowl
game
gloaming
human
hunting
impacts
inhabitants
issues
lights
mallard
municipal
nightfall
ornithology
platyrhynchos
pollution
population
poultry
seabird
sedentary
shoal
stormy
strange
street
synanthropic
town
traffic
transportation
turbulent
twilight
uncommon
unusual
urban
waterfowl
zoology