Common Poorwill vs Cayenne Nightjar
Phalaenoptilus nuttallii в сравнении с Setopagis maculosa
Side-by-Side Comparison
| Характеристика | Common Poorwill | Cayenne Nightjar |
|---|---|---|
| Научное название | Phalaenoptilus nuttallii | Setopagis maculosa |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Caprimulgidae | Caprimulgidae |
| Охранный статус | Least Concern | Data Deficient |
| Длина | — | — |
| Размах крыльев | 28,8 cm (11.3 in) | 27,8 cm (10.9 in) |
| Масса | 46,45 g (1.64 oz) | 47,0 g (1.66 oz) |
| Питание | Catches moths, beetles, and flying insects on short sallies near ground; only bird known to … | Catches flying insects in aerial pursuit at night over South American forest and scrub. |
| Размер кладки | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Common Poorwill
Clear, whistled 'poor-WILL' with burry quality; sometimes 'poor-will-ip'; carries well across desert scrub; may call thousands of times in a night; males very persistent
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
Common Poorwill
Resident of arid scrub, sagebrush, and chaparral in western North America from British Columbia south to central Mexico; only hibernating bird.
Cayenne Nightjar
Known from a few specimens from French Guiana; possibly a rare resident of coastal forest and scrub; poorly known.
Охранный статус
Common Poorwill
Cayenne Nightjar
How to Tell Them Apart
Common Poorwill
Grey-brown and buff mottled with dark vermiculations; white throat patch bordered by dark collar; pale buff and dark barred underparts; white tips on outer tail feathers; no white wing patches; …
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
Common Poorwill
A small Caprimulgidae nightjar (~46 g) of arid shrubland and rocky desert from southwestern Canada to central Mexico. The only bird known to enter true torpor for extended periods (weeks) as a winter survival strategy. Cryptic grey-brown plumage. Feeds on moths and beetles at night. 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.