Cere The area at the base of the bill or beak.
Clutch A group of eggs or chicks in a nest.
DDT dichlorodiphenyltrichloroethane, a colorless insecticide
widely used during the 50s and 60s whose side effects wreaked havoc on a
number of species, including the peregrine. Though banned in the U.S. since 1972, DDT is
still in use in South America, where many peregrines winter.
Egg tooth A hard pointed knob on the top of the beak of an
unhatched peregrine (or other bird) used to break out of the shell.
Eyas or eyass A young peregrine still in the nest (or a raptor
taken while still a nestling).
Falconry The art of training falcons to capture wild game or
fowl for a human hunter. Also known as hawking.
Furniture The equipment needed by a falconer.
Hack/hacking Giving birds complete liberty. Falconers may
"hack" young birds during the training process so they can develop their flying
Haggard A mature wild hawk or falcon.
Mews Main living area for a falconers bird.
Passager A raptor still in its first-year plumage.
Raptor A bird of prey.
Scrape A nest.
Stoop The hunting technique in which the raptor folds its wings
and dives at its prey. Peregrines, which only hunt other birds, can reach more than 200
miles an hour.
Tiercel Male raptor. Technically, only the female is a