Falcon

BirdRaptorAerial Predator

Adult peregrine falcon (Falco peregrinus) at a cliff nest with four chicks.

Peregrine falcon (Falco peregrinus) at the nest with chicks.

Image: Jacob W. Frank / U.S. National Park Service, Public domain, via Wikimedia Commons (NPS).

Overview

Falcons are diurnal birds of prey in the family Falconidae, distinct from the hawks and eagles of family Accipitridae. They are characterised by long, pointed wings, a short hooked beak with a notch (the "tomial tooth"), and — in many species — exceptional flight performance. The peregrine falcon (Falco peregrinus) is the most widely distributed and commonly cited reference species; the genus Falco also includes kestrels, hobbies, gyrfalcons, and many other species.

Habitat & Range

Falcons occupy an extraordinary range of habitats — from arctic tundra to tropical forest edge and dense urban environments. Peregrine falcons in particular have adapted to nesting on tall buildings and bridges in many large cities. Specific range and conservation status varies by species; verify on the IUCN Red List for any species of interest.

Diet

Most falcons are predominantly bird-eating predators that hunt on the wing, although diet varies by species — kestrels, for example, take significant numbers of small mammals and large insects. Falcons are renowned for high-speed aerial attacks; the peregrine's diving "stoop" is widely cited as one of the fastest sustained movements of any animal.

Behavior

Falcons are typically territorial during the breeding season with strong pair bonds, often returning to the same nest site year after year. Outside the breeding season some species are highly migratory. Unlike many other raptors, falcons do not build their own large stick nests; they use existing ledges, scrapes, or other birds' old nests.

Human Interaction & Conservation

Falcons have a long history with humans through the practice of falconry. In the 20th century, populations of several falcon species — including the peregrine — declined sharply due to organochlorine pesticide use (notably DDT), which caused eggshell thinning. Bans on these pesticides and large-scale captive-breeding programmes have allowed many populations to recover, but several falcon species remain threatened. Local and international law typically protects wild falcons; any interaction should follow national wildlife regulations.

Similar Animals

Falcons are often grouped with hawks and eagles under the broad label "raptors" but are in a separate evolutionary lineage. See falcon-vs-eagle for a structured comparison with eagles.

Frequently Asked Questions — Falcon

Is the peregrine falcon really the fastest bird?
The peregrine falcon's diving 'stoop' is widely cited as the fastest sustained movement recorded in an animal, with speeds estimated in excess of 300 km/h. Specific figures depend on measurement method and individual bird; cite a primary scientific source if you need an exact figure.
Are falcons the same as hawks?
No. Falcons (family Falconidae) and hawks (mostly family Accipitridae) are different evolutionary lineages despite some superficial similarities. Recent genetic work places falcons closer to parrots and songbirds than to hawks.
Can falcons be kept as pets?
Most jurisdictions strictly regulate falcon keeping. Falconry is a long-standing licensed practice in many countries with specific apprenticeship, permitting, and welfare requirements; casual 'pet' keeping is generally not legal. Consult national wildlife authorities and falconry associations.
Why did peregrine populations crash in the mid-1900s?
Widespread use of organochlorine pesticides, particularly DDT, caused thin eggshells and breeding failure in many raptor species. After DDT bans and captive-breeding reintroductions, peregrine populations have recovered substantially in much of their range. Authoritative summaries are available from reference sources cited on this page.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.