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Long-billed hermit

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Long-billed hermit
Photographed in Drake Bay, Costa Rica
CITES Appendix II (CITES)[3]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Strisores
Order: Apodiformes
Family: Trochilidae
Genus: Phaethornis
Species:
P. longirostris
Binomial name
Phaethornis longirostris
(Delattre, 1843)

The long-billed hermit (Phaethornis longirostris) is a bird in the family Trochilidae, the hummingbirds. It is found from central Mexico south through Central America, Colombia and Ecuador into Peru.[4]

Taxonomy and systematics

It has often been considered conspecific with what is now the long-tailed hermit, P. superciliosus, which is found east of the Andes. The two populations were called the western and eastern long-tailed hermits; the "eastern" was dropped after the split into two species and the renaming of the western population.[5][6][7]

The South American Classification Committee (SACC) of the American Ornithological Society, the International Ornithological Committee (IOC), and the Clements taxonomy assign these four subspecies to the long-billed hermit:[5][4][8]

However, BirdLife International's Handbook of the Birds of the World (HBW) treats P. l. baroni as a separate species, "Ecuadorian hermit".[9] The SACC in 2006 had rejected that treatment.[6] Other subspecies within longirostrus and cephalus have been proposed but have not been accepted.[10]

P. l baroni ("Ecuadorian hermit")

Description

The long-billed hermit is 13 to 16 cm (5.1 to 6.3 in) long. Males weigh 5 to 7.5 g (0.18 to 0.26 oz) and females 4 to 6.5 g (0.14 to 0.23 oz). The nominate subspecies P. l. longirostris has greenish-brown upperparts and brownish to grayish underparts. Its uppertail coverts have dark and light ochre bands and the central tail feathers are long with long white tips. It has a long decurved bill, with the female's being shorter but more curved than the male's. P. l. cephalus is similar but its underparts become more ochraceous towards the southern part of its range. P. l. susurrus is larger than cephalus but similarly colored. P. l. baroni's upperparts are dull metallic green and its belly is whiter than those of the other subspecies.[10]

Distribution and habitat

The subspecies of long-billed hermit are found thus:[4][10]

The species inhabits the understory and edges of a variety of landscapes including rainforest, tall secondary forest, humid semi-deciduous forest, cloudforest, and gallery forest. It has been recorded from sea level to 1,000 m (3,300 ft) in Costa Rica, to 1,500 m (4,900 ft) in eastern Mexico, to 2,500 m (8,200 ft) in northern Colombia, to 400 m (1,300 ft) in Peru, and to at least 1,300 m (4,300 ft) and possibly to 1,700 m (5,600 ft) in Ecuador.[10]

Behavior

Movement

The long-billed hermit is not known to make large-scale movements but is thought to wander short distances.[10]

Feeding

The long-billed hermit is a "trap-line" feeder like other hermit hummingbirds, visiting a circuit of a variety of flowering plants for nectar. Examples include Heliconia, Costus, Aphelandra, and Pasiflora. It also consumes small arthropods.[10]

Breeding

The long-billed hermit's breeding seasons vary considerably throughout its range, from April to July in Mexico, May to September in Panama, and January to April or May in Colombia. The nest is a cone-shaped cup made of plant fibers and spider silk suspended from the underside of a drooping leaf. The clutch size is two eggs; The incubation period is 17 to 18 days with fledging 22 to 23 days after hatch.[10]

During the breeding season, male long-billed hermits sing in communal leks of up to 25 birds, and also wiggle their long tails in display. Competitive lek singing can occupy half of the daylight hours to attract females.[10] In addition, mature males have a longer bill than females, and appear to use its dagger-like tip as a secondary sexual trait to defend against other males at the lek.[11]

Dickcissel male perched on a metal pole singing, with neck stretched and beak open.

Songs and calls
Listen to long-billed hermit on xeno-canto

Vocalization

The songs of the three northern subspecies of long-billed hermit are "a continuous series of single, piercing, usually upslurred 'sweeup' notes". Their call is "a sharp, explosive 'week!'" that is often given in flight. The song of P. l. baroni is "a continuous series of single, sparrow-like, chipping notes...'tchee..tchee..tchee..'." Its call is "a thin 'seep'" also given in flight.[10]

Status

The IUCN follows HBW taxonomy, and so has separately assessed the long-billed hermit and "Ecuadorian hermit" as being of Least Concern. The population sizes and trends of both are unknown.[1][2] P. l. susurrus has a small range that potentially places it at risk. P. l. cephalus occurs in many protected areas in Costa Rica. P. l. baroni is considered fairly common throughout its range and occurs in some protected areas.[10]

References

  1. ^ a b BirdLife International (2016). "Long-billed Hermit Phaethornis longirostris". IUCN Red List of Threatened Species. 2016: e.T22725723A94900895. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725723A94900895.en. Retrieved 9 December 2021.
  2. ^ a b BirdLife International (2016). "Ecuadorian Hermit Phaethornis baroni". IUCN Red List of Threatened Species. 2016: e.T22725731A94901112. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725731A94901112.en. Retrieved 9 December 2021.
  3. ^ "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  4. ^ a b c Gill, F.; Donsker, D.; Rasmussen, P. (July 2021). "IOC World Bird List (v 11.2)". Retrieved July 14, 2021.
  5. ^ a b Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 August 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved August 24, 2021
  6. ^ a b "Proposal (#136) to South American Classification Committee". Archived from the original on 2005-11-04. Retrieved 2021-12-09.
  7. ^ "Proposal (#205) to South American Classification Committee". Archived from the original on 2006-09-04. Retrieved 2021-12-09.
  8. ^ Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ Retrieved August 25, 2021
  9. ^ HBW and BirdLife International (2020) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip [.xls zipped 1 MB] retrieved May 27, 2021
  10. ^ a b c d e f g h i j del Hoyo, J., C. Hinkelmann, N. Collar, P. F. D. Boesman, and G. M. Kirwan (2020). Long-billed Hermit (Phaethornis longirostris), version 1.0. In Birds of the World (S. M. Billerman, B. K. Keeney, P. G. Rodewald, and T. S. Schulenberg, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.lobher.01 retrieved December 9, 2021
  11. ^ Rico-Guevara, A.; Araya-Salas, M. (2015). "Bills as daggers? A test for sexually dimorphic weapons in a lekking hummingbird". Behavioral Ecology. 26 (1): 21–29. doi:10.1093/beheco/aru182.

Further reading

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