AudioDateDownLeftRightUpCloseReportGallerySettingsGiftLanguageGridListMapMenuPhotoPlayPlusSearchStarUserIconVideo

Merlin

Falco columbarius

Order:
Falconiformes
Family:
Falconidae
Sections
  • Authors: Sodhi, N. S., L. W. Oliphant, Paul C. James and I. G. Warkentin
  • Revisors: Warkentin, I. G., N. S. Sodhi, R. H. M. Espie and Alan F. Poole
  • Published: Feb 1, 2005
Listen

Free Introduction Article Access

The Introduction Article is just the first of 11 articles in each species account that provide life history information for the species. The remaining articles provide detailed information regarding distribution, migration, habitat, diet, sounds, behavior, breeding, current population status and conservation. Each species account also includes a multimedia section that displays the latest photos, audio selections and videos from Macaulay Library’s extensive galleries. Written and continually updated by acknowledged experts on each species, Birds of North America accounts include a comprehensive bibliography of published research on the species.

A subscription is needed to access the remaining account articles and multimedia content. Rates start at $5 USD for 30 days of complete access.

Subscribe Now

Already a subscriber? Sign In
Enlarge
Figure 1. Breeding and nonbreeding (wintering) distribution of the Merlin in North America.

Breeding and nonbreeding (wintering) distribution of the Merlin in North America. Occurs sporadically in winter throughout central and eastern U.S. Adapted from Clark and Wheeler 1987.

Enlarge
Adult male Prairie Merlin, subspecies richardsonii; Colorado, February.

Adult male Prairie Merlin (F.c. richardsonii) with a Horned Lark (Eremophila alpestris). Small birds comprise a large proportion of a Merlin's diet, and Horned Larks are prime targets on the shortgrass prairie. Male Prairie Merlins can be distinguished from other Merlin subspecies by their sky blue upperparts, lightly streaked underparts and rufous leggings. Pawnee Grasslands, Colorado, February.; photographer Brian L. Sullivan

© Cornell Lab of Ornithology

The Merlin is a small, dashing falcon that breeds throughout the northern forests and prairies of North America, Europe, and Asia. Only slightly larger than the more common American Kestrel (Falco sparverius), it is heavier and in flight often appears considerably larger. The sexes differ in adult plumage, with females noticeably larger than males. This falcon was previously called the "Pigeon Hawk" because in flight it can be mistaken for a member of the pigeon family; its species name (columbarius) also refers to pigeons. "Merlin" derives from esmerillon, the Old French name for this species. There are three North American subspecies: the Black Merlin (F. c. suckleyi) from the Pacific Northwest, the Taiga (or better-named Boreal) Merlin (F. c. columbarius) of northern forests, and the Prairie Merlin (F. c. richardsonii), a pale colored form that breeds in northern prairies and aspen parkland of the U.S and southern Canada.

Primarily monogamous, the Merlin raises one brood each breeding season, laying its eggs in the abandoned nests of crows or hawks. It feeds predominantly on small birds, which it generally catches in short, quick flights. Within the last 30 years, breeding populations have colonized an increasing number of urban centers, particularly in the northern Great Plains. This development of urban populations occurred at the same time as the species underwent a substantial recovery from its post-DDT era population low, when many rural populations disappeared.

Although its small size makes the Merlin unsuitable for hawking large quarry, in Medieval Europe it became popular as a "lady's hawk" and was used in the now classical ringing flights directed at the Skylark (Alauda arvensis). Catherine the Great and Mary Queen of Scots were among the more famous enthusiasts of this sport. These lark flights have continued as a tradition in Great Britain, although falconers are now under public pressure to stop the sport. In North America, a small number of falconers fly Merlins at avian quarry ranging from sparrows to doves. Although not nearly as popular as the larger species, their speed and tremendous heart have earned them a loyal following.

Breeding studies have been conducted on Merlin populations across its North American range, except for the west coast subspecies. Particularly well-studied are Merlins resident in urban centers on the northern Great Plains.  Substantial contributions have been made through long-term studies of rural populations in Britain and Sweden.

Recommended Citation

Warkentin, I. G., N. S. Sodhi, R. H. M. Espie, Alan F. Poole, L. W. Oliphant and Paul C. James. (2005). Merlin (Falco columbarius), The Birds of North America (P. G. Rodewald, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/merlin

DOI: 10.2173/bna.44