英文關鍵字
adaptation
air
animal
aspiration
background
beautiful
beauty
behavior
bird
breed
distance
dream
ecology
ecosystem
environment
evolution
feather
flight
fly
flying
free
freedom
gull
heaven
high
instinct
lifespan
metabolism
migration
motion
nature
navigation
ornithology
outdoor
peace
population
science
seagull
sky
slow
slowmo
species
study
survival
travel
wild
wildlife
wind
wing
world