Peregrine falcons, one of the most agile of all birds in flight, are
more typical of the Falconidae. Called pigeon and duck hawks, they dive
on their prey from great heights, attaining speeds as high as 280
kilometres per hour. True falcons are magnificent birds with long, powerful wings and short
tails. They generally hunt from the air, and most kill aloft.
falcons show the greatest agility of flight of all birds, and can
probably reach 130 kilometres per hour in level flight. Often a pair of birds will
hunt together, with one bird driving the prey within reach of the other.
Among falconers the male is called a tercel or thirdling, from the
belief that it is the third egg in a clutch that produces a male.