Buff-collared Nightjar vs Cayenne Nightjar
Antrostomus ridgwayi comparado com Setopagis maculosa
Side-by-Side Comparison
| Atributo | Buff-collared Nightjar | Cayenne Nightjar |
|---|---|---|
| Nome científico | Antrostomus ridgwayi | Setopagis maculosa |
| Ordem | Caprimulgiformes | Caprimulgiformes |
| Família | Caprimulgidae | Caprimulgidae |
| Estado de conservação | Least Concern | Data Deficient |
| Comprimento | — | — |
| Envergadura | 30,0 cm (11.8 in) | 27,8 cm (10.9 in) |
| Peso | 49,5 g (1.75 oz) | 47,0 g (1.66 oz) |
| Dieta | Catches moths and flying insects at night over arid scrub and rocky canyons of Mexico … | Catches flying insects in aerial pursuit at night over South American forest and scrub. |
| Tamanho da postura | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Buff-collared Nightjar
Rapid, staccato 'cuk-cuk-cuk-WEEEER'; accelerating series ending in long slurred note; carries through arid Mexican canyons; distinctive rapid chucking intro
Cayenne Nightjar
Poorly known vocalizations; presumed churring trill based on genus; extremely rare recordings; distinct from other Setopagis by subtle tonal and rhythm differences
Geographic Range & Migration
Buff-collared Nightjar
Breeds in arid scrub and dry woodland in southwestern USA (Arizona, New Mexico) and western Mexico; winters south to Honduras.
Cayenne Nightjar
Known from a few specimens from French Guiana; possibly a rare resident of coastal forest and scrub; poorly known.
Estado de conservação
Buff-collared Nightjar
Cayenne Nightjar
How to Tell Them Apart
Buff-collared Nightjar
Brown and grey mottled with dark vermiculations; buff-orange collar across hindneck diagnostic; white gorget in male; pale buff underparts with dark barring; white outer tail spots in male; arid southwest …
Cayenne Nightjar
Brown and buff mottled above with dark vermiculations; pale buff below with darker barring; white throat patch in male; outer tail spots white; data deficient; known from only a handful …
About These Birds
Buff-collared Nightjar
A medium-small Caprimulgidae nightjar (~50 g) of arid scrub, rocky canyon slopes, and thorn forest from the southwestern United States to Nicaragua. A buff nuchal collar distinguishes it from similar species. Calls with a loud 'cuck-cuck-cuck-coo-chee' phrase. Feeds on moths and beetles. Least Concern.
Cayenne Nightjar
A small Caprimulgidae nightjar (~47 g) from coastal French Guiana and adjacent Suriname. Known from only a handful of specimens; biology essentially unknown. Mottled brown plumage presumed cryptic in leaf litter. Presumed nocturnal insectivore. Data Deficient due to extreme rarity of confirmed records in the wild.