Which are the only birds able to fly backwards?
Hummingbirds Trochillidae Humming birds Trochiliformes Trochilidae Train-bearer Humming-bird Humming bird Humming Birds Hummingbird
trochilidae humming bird train bearer humming birds trochillidae trochiliformes hummingbird hummingbirds
hummingbirds
WikipediaEntity
Hummingbirds