Owlet-nightjar

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Owlet-nightjars
Temporal range: Early Miocene to present
Barred owlet-nightjar (Aegotheles bennettii)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Strisores
Clade: Daedalornithes
Order: Aegotheliformes
Worthy et al., 2007
Family: Aegothelidae
Bonaparte, 1853
Genus: Aegotheles
Vigors & Horsfield, 1827
Type species
Caprimulgus novaehollandiae[1]
Latham, 1790
Synonyms
  • Euaegotheles Mathews, 1918
  • Megaegotheles Scarlett, 1968

Owlet-nightjars are small

monotypic family Aegothelidae with the genus
Aegotheles.

Owlet-nightjars are insectivores which hunt mostly in the air but sometimes on the ground; their soft plumage is a cryptic mixture of browns and paler shades, they have fairly small, weak feet (but larger and stronger than those of a frogmouth or a nightjar), a tiny bill that opens extraordinarily wide, surrounded by prominent whiskers. The wings are short, with 10 primaries and about 11 secondaries; the tail long and rounded.

Systematics

A comprehensive 2003 study

second millennium AD
.

The relationship between the owlet-nightjars and the (traditional)

Daedalornithes
.

In form and habits, however, they are very similar to both caprimulgiform group – or, at first glance, to small

hummingbirds
, two groups of birds which are morphologically very specialized, seem to have looked very similar to a small owlet-nightjar, possessing strong legs and a wide gape, while the legs and feet are very reduced in today's swifts and hummingbirds, and the bill is narrow in the latter.

Owlet-nightjars are an exclusively Australasian group, but close relatives apparently thrived all over Eurasia in the late Paleogene.

Taxonomy

Phylogeny of Aegothelidae[5]
Aegotheles

A. savesi

A. insignis

A. tatei

A. crinifrons

A. cristatus

A. affinis

A. bennettii

A. salvadorii

A. wallacii

A. archboldi

A. albertisi

Family Aegothelidae[6]

A

million years ago), it seems to represent an owlet-nightjar ancestral to A. novaezealandiae.[7] In 2022, an additional specimen from the same locality was described by Worthy et al. as a new extinct species of Aeotheles, A. zealandivetus. The holotype specimen is NMNZ S.52917, a distal right tarsometatarsus.[8]

Footnotes

  1. ^ "Apodidae". aviansystematics.org. The Trust for Avian Systematics. Retrieved 2023-08-05.
  2. ^ Dumbacher et al. (2003)
  3. ^ Mayr (2002)
  4. ^ Simonetta (1967)
  5. ^ Boyd, John (2007). "STRISORES II- Apodiformes". John Boyd's website. Retrieved 30 December 2017.
  6. IOC World Bird List
    . v8.1. Retrieved 30 December 2017.
  7. ^ Worthy et al. (2007)
  8. S2CID 247993690
    .

References