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