Blackish Rail
Pardirallus nigricans
Medium-sized marsh bird, plump and chickenlike. Slaty gray below and brown above. Note bright red legs and long greenish-yellow bill. Most similar to Plumbeous Rail but lacks red on base of bill. Found in marshy habitats including pastures and rice fields. Secretive but sometimes seen feeding at the edge of dense grasses; flicks tail when it walks. More often heard than seen: listen for loud, grating squeals.
Identification
The blackish rail is 27 to 29 cm (11 to 11 in) long; one male weighed 217 g (7.7 oz). The sexes are alike. They have a long yellow-green bill and pinkish legs. The nominate subspecies has unmarked dark brown upperparts, a white chin and throat, and dark gray face and underparts. P. n. caucae is larger than the nominate and has a larger and whiter throat patch and paler underparts especially at the vent.
Taxonomy
The blackish rail has previously been placed in the large genus Rallus, and also in genus Orygonax with the plumbeous rail (Pardirallus sanguinolentus). Some authors propose that the blackish and plumbeous rails are conspecific, and they do form a superspecies. The blackish rail has two subspecies, the nominate P. n. nigricans and P. n. caucae.
- Scientific name
- Pardirallus nigricans
- Authority
- (Vieillot, 1819)
- Order
- Gruiformes
- Family
- Rallidae
- Genus
- Pardirallus
Range and habitat
The blackish rail has a disjunct distribution. The nominate subspecies has two populations. One is found from northeastern Brazil south and west to southeastern Brazil, northern Argentina, and eastern Paraguay. The other forms a rough crescent from western Brazil through central Peru and Ecuador nearly to the border with Colombia. There are also sight records in Bolivia that lead the South American Classification Committee of the American Ornithological Society to call it hypothetical in that country. Subspecies P. n. caucae is found in central Colombia (it is named for the Cauca River). The species has been documented in western Venezuela, but whether as a member of P. n. caucae or an undescribed subspecies is not known. <p>The blackish rail inhabits wet landscapes including marshes, heavily vegetated waterways, rice fields, wet grasslands, and lightly wooded swamps. It is mostly a bird of the lowlands but in the Andes is found between 800 and 2,200 m (2,600 and 7,200 ft) and there is one record in Peru at about 4,100 m (13,500 ft).
- Migration
- Resident species
Behavior
No movement by the blackish rail has been documented except for the vagrant in Peru.<p>The blackish rail usually forages in cover but occasionally in the open at the edges of vegetation or in small clear areas. Its diet is not known but is assumed to be insects and other invertebrates. There is one record of an individual "venturing 5m into [a] restaurant garden for food scraps."<p>The blackish rail's breeding season has not been determined. One nest of either the blackish or plumbeous rail was a cup placed among shoots on a stump in a swamp. The clutch size is two or three and the incubation time (in captivity) is 18 to 21 days. The black downy chicks leave the nest soon after they hatch, and both parents care for the chicks.<p>The blackish rail has a large vocal repertoire. What is thought to be a male song is a "very sharp, loud, penetrating, repeated 'whuueeee' or 'wheee'." Other vocalizations have been described as a "very fast, metallic 'tii'd'dit'", a "complaining 'keeeeaaa'", a "rapid, repeated 'chchchee'" and a "sharp double squeak".
Conservation
- Population trend
- unknown
Photos
Distribution
Bird Calls
Other Birds
Miombo Rock-Thrush
Monticola angolensis
Attractive rock-thrush in which males and females are strikingly different. Males have a gray head and back and rufous underparts, while females have a brown, heavily scalloped head and back and mostly white underparts. Found very locally in miombo broadleaf woodland. The song consists of musical, vibrating whistles. Similar to migratory Rufous-tailed Rock-Thrush, but male lacks white back and female has little or no scalloping below.
Wallace's Hawk-Eagle
Nisaetus nanus
Typical small hawk-eagle. Small upright crest visible when perched. Adult has dark brown wings and a paler face. In flight, look for densely black-barred underparts, two white bands across the tail, and light brown on the inner part of the underwing (compared with the completely black-and-white underwings of Blyth’s Hawk-Eagle). Visibly smaller than both Blyth’s and Mountain hawk-eagles. Juvenile Wallace’s is pale tawny-brown on the head and on the underparts; the similar Blyth’s Hawk-Eagle has tail barring. Jerdon’s Baza can appear similar, but it has horizontal banding across the breast, whereas juvenile Wallace’s has unmarked underparts, pantaloons (fully feathered legs), and a broader black tip to the tail. Wallace’s Hawk-Eagle is often seen in flight over or perched on a snag in lowland forests and forest edges.
Purple-throated Sunbird
Leptocoma sperata
A very small bird of wooded areas from the lowlands to lower elevations in the mountains. Male has dark upperparts with a greenish crown and rump, a deep purple throat and upper chest, and a bright red lower chest and upper belly. In Sulu and west Mindanao birds, the red on the chest is replaced by yellow with an orange wash. Male is distinctive. Female resembles several other drab female sunbirds, but has a yellow brow and chest and a brown wing. Call is a sharp upslurred “tsweep!”
Start Your Bird Watching Journey
Identify a bird outdoors and keep the field guide close for your next observation.