Sentences with phrase «bird keels over»

When a pet bird keels over in its cage, suspicion naturally falls on the cat in the apartment.

Not exact matches

Archaeopteryx doesn't have several features considered essential to flight in modern birds, such as a keeled breastbone to which several important flight muscles attach; a ball - and - socket arrangement that allows the wing to flap fully up over the back and down again; and a muscle pulley system that links chest and shoulder muscles, allowing the birds to swiftly alternate between powerful downstrokes and upstrokes.