environmental
adult
america
anas
anatidae
animal
anseriformes
autumn
avian
background
beautiful
biodiversity
biology
bird
blue
calm
closeup
colorful
conservation
dabble
dabbling
detail
drake
duck
dusk
ecology
ecosystem
environment
face
fall
fauna
feathers
fowl
head
iridescence
iridescent
lake
male
mallard
maryland
nature
north
ornithology
peaceful
platyrhynchos
plumage
pond
profile
resting
river
serene
shade
shady
sitting
sunset
water
waterfowl
wetlands
wild
wildfowl
wildlife
zoology