Clapper Rail
Rallus crepitans
Large, generally drab rail, but plumage variable depending on location. Can look very similar to King Rail. Atlantic coast birds dull grayish-brown overall with few contrasting features; faintly barred gray-and-white on sides and pale orange bill. Gulf Coast population brighter with orange neck, more similar to King Rail; note paler and more diffuse barring on sides and less contrasting dark streaks on back. Almost always found in saltmarshes close to the coast, where it can be abundant and vocal. Never in inland freshwater marshes, where replaced by King Rail. Usually shy, but regularly seen feeding along the edge of channels. Listen for series of harsh "kek" notes or loud, rasping grunts erupting from marsh. Sometimes hybridizes with King Rail where fresh and saltwater meet; some birds best left unidentified.
Identification
The clapper rail is a chicken-sized bird that rarely flies. It is grayish brown with a pale chestnut breast. Males and females have similar plumage. The bill which curves slightly downwards is orange yellow at the base in males and duller in females. An adult bird has an overall length of 32–41 cm (13–16 in) and weighs 199–400 g (7.0–14.1 oz).
Taxonomy
The clapper rail was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with all the other rails in the genus Rallus and coined the binomial name Rallus crepitans. Gmelin based his description on those by Thomas Pennant and John Latham. The type locality is Long Island, New York. The genus Rallus had been erected in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae. The specific epithet crepitans is Latin meaning "breaking wind" or "resounding".<p>The clapper rail was formerly treated as a subspecies of the mangrove rail (Rallus longirostris). The decision to treat the clapper rail as a separate species was based on the results of a molecular phylogenetic study that was published in 2013. A cladogram based on the 2013 genetic study is as follows:<p>Eight subspecies of the clapper rail are recognised:
- Scientific name
- Rallus crepitans
- Authority
- Gmelin, JF, 1789
- Order
- Gruiformes
- Family
- Rallidae
- Genus
- Rallus
Range and habitat
The clapper rail is found along the Atlantic coasts of the eastern U.S., the Gulf of Mexico, eastern Mexico, some Caribbean islands, and south through eastern Central America, as well at several inland locales. Populations are stable on the East Coast of the U.S., although the numbers of this bird have declined due to habitat loss. Clapper rails are saltmarsh specialists, and are highly mobile across their range, with females showing weak philopatry and a lack of philopatry in males.
- Migration
- Complete migrants
Behavior
These birds eat crustaceans, aquatic insects, and small fish. They search for food while walking, sometimes probing with their long bills, in shallow water or mud.<p>The nest is a large platform of dry grasses and is usually placed on the ground in dense vegetation. The clutch size varies between 4 and 16 eggs with an average of 9. The eggs measure 42.5 mm × 30 mm (1.67 in × 1.18 in) and are creamy white with irregular blotches of reddish-brown, grey or lilac. They are incubated for 20 days by both parents with the male incubating at night. The young are brooded by the adults for several days. They become independent of the adults when 6 weeks old and can fly when 10 weeks old.
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
Other Birds
White-throated Screech-Owl
Megascops albogularis
Large screech-owl found in temperate forests, typically from around 2,300–3,400 m. Quite dark brown overall with small pale spots and bars covering head, back, and wings. Belly is paler tawny with dark streaks. White throat patch is usually obvious. Sexes similar. Strictly nocturnal and thus more often heard than seen; listen for a fairly short and slow series of toots that descends in pitch, often given as a duet.
Arctic Warbler
Phylloscopus borealis
Dull, relatively unmarked olive-brown warbler with a prominent yellowish-white eyestripe, faint wingbars, and pale whitish underparts. Visually inseparable from Japanese and Kamchatka Leaf Warblers; listen for song, an electric chattery trill. Also gives a metallic two-noted call and a short harsh buzz. Breeds in shrubby areas, often near water, throughout the Eurasian taiga. Breeding range extends to Alaska, where it is the only leaf warbler. Winters in lowland and foothill forest, forest edge, and gardens, primarily in Southeast Asia.
Atlas Flycatcher
Ficedula speculigera
Very similar and closely related to European Pied Flycatcher. Males have mixed features of Collared and European Pied Flycatchers, but note very large white wing patch and big white forehead. Also note the absence of a white collar and pale rump patch on Atlas Flycatcher. Females are very difficult to distinguish, but note gray upperparts with paler rump and big white primary base patch. Song is a cheery up-and-down series, quite similar to that of European Pied. Calls subtly different from European Pied Flycatcher with a slightly more metallic "whit" and a slower tempo. Inhabits a variety of wooded habitats in the Atlas Mountains.
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