Rufescent tiger heron

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Rufescent tiger heron
Rufescent tiger heron (Tigrisoma lineatum).JPG
in the Pantanal, Brazil
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Pelecaniformes
Family: Ardeidae
Genus: Tigrisoma
Species:
T. lineatum
Binomial name
Tigrisoma lineatum
(Boddaert, 1783)
Tigrisoma lineatum map.svg

The rufescent tiger heron (Tigrisoma lineatum) is a species of heron in the family Ardeidae. It is found in wetlands from Central America through much of South America.

Contents

Juvenile - Sacha Lodge - Ecuador Rufescent Tiger- Heron.jpg
Juvenile - Sacha Lodge - Ecuador
T. l. lineatum, young adult, Panama Rufescent tiger heron (Tigrisoma lineatum lineatum) young adult head.jpg
T. l. lineatum, young adult, Panama

Taxonomy

The rufescent tiger heron was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1780 in his Histoire Naturelle des Oiseaux from a specimen collected in Cayenne, French Guiana. [2] The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. [3] Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Ardea lineata in his catalogue of the Planches Enluminées. [4] The rufescent tiger heron is now placed in the genus Tigrisoma that was erected by the English naturalist William Swainson in 1827. [5] [6] The genus name Tigrisoma combines the Ancient Greek tigris, meaning "tiger" and somā, meaning "body"; the specific epithet lineatum is from the Latin lineatus meaning "marked with lines". [7]

Two subspecies are recognised: [6]

Description

The rufescent tiger heron is a medium-sized heron, measuring 26–30 in (66–76 cm) in length, [nb 1] [9] with a mass between 630 and 980 g (22 and 35 oz). [10] The sexes are similarly plumaged. [11] The adult's head, neck and chest are dark rufous, with a white stripe down the center of the foreneck. The remainder of its upperparts are brownish with fine black vermiculations, its belly and vent are buffy-brown, and its flanks are barred black and white. [12] Its tail is black, narrowly barred with white. [13] Its stout bill is yellowish to dusky, and its legs are dull green. [12] Its irides, loral skin, and orbital ring are bright yellow. [13] Unlike other tiger herons, it has no powder down feathers on its back. [11]

The juvenile bird is rusty-buff overall, coarsely barred with black; the buff and black banding on its wings is especially pronounced. Its throat, central chest, and belly are white. It takes some five years to acquire adult plumage. [12]

Similar species

The adult rufescent tiger heron is relatively easy to distinguish from fasciated and bare-throated tiger herons, as it is rufous (rather than primarily gray) on the head and neck. Young birds, however, are much more difficult to identify. [9]

Distribution and habitat

The rufescent tiger heron is found in wetlands from Central America through much of South America. [12] It generally occurs below 500 m (1,600 ft), though it has been recorded as high as 1,600 m (5,200 ft) in Colombia. [9]

Behavior

It is largely crepuscular and generally solitary. [9] [13]

Food and feeding

As might be expected of a species that spends most of its time by the water, much of the rufescent tiger heron's diet is aquatic-based, including fish, crustaceans, water beetles, and dragonfly larvae. It also takes adult dragonflies and grasshoppers. [11] It typically hunts alone, standing hunched in shallow pools or wet areas of a forest while it waits for prey. [9]

Voice

The rufescent tiger heron's main call is a low-pitched paired hoot, often given at night. [12] It also gives a fast series of sharp wok notes, which decrease in volume and speed, and a prolonged hoot, transcribed as ooooooo-ooh which rises markedly at the end. [9]

Juvenile Tigrisoma lineatum -Uarini, Amazonas, Brasil -juvenile-8.jpg
Juvenile

Conservation

Although the rufescent tiger heron's population size and trend has not been quantified, its range is huge, so the International Union for Conservation of Nature lists it as a species of least concern. [1]

Notes

  1. ↑ By convention, length is measured from the tip of the bill to the tip of the tail on a dead bird (or skin) laid on its back. [8]

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References

  1. 1 2 BirdLife International (2012). "Tigrisoma lineatum". IUCN Red List of Threatened Species . 2012. Retrieved 26 November 2013.
  2. ↑ Buffon, Georges-Louis Leclerc de (1780). "L'onoré rayé". Histoire Naturelle des Oiseaux (in French). Volume 14. Paris: De L'Imprimerie Royale. pp. 181–182.|volume= has extra text (help)
  3. ↑ Buffon, Georges-Louis Leclerc de; Martinet, François-Nicolas; Daubenton, Edme-Louis; Daubenton, Louis-Jean-Marie (1765–1783). "L'onoré rayé, de Cayenne". Planches Enluminées D'Histoire Naturelle. Volume 9. Paris: De L'Imprimerie Royale. Plate 860.|volume= has extra text (help)
  4. ↑ Boddaert, Pieter (1783). Table des planches enluminéez d'histoire naturelle de M. D'Aubenton : avec les denominations de M.M. de Buffon, Brisson, Edwards, Linnaeus et Latham, precedé d'une notice des principaux ouvrages zoologiques enluminés (in French). Utrecht. p. 52, Number 860.
  5. ↑ Swainson, William John (1827). "On several groups and forms in ornithology, not hitherto defined". Zoological Journal. 3: 343–363 [362].
  6. 1 2 Gill, Frank; Donsker, David, eds. (2019). "Ibis, spoonbills, herons, hamerkop, shoebill, pelicans". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 16 July 2019.
  7. ↑ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp.  228, 386. ISBN   978-1-4081-2501-4.
  8. ↑ Cramp, Stanley, ed. (1977). Handbook of the Birds of Europe, the Middle East and North Africa: Birds of the Western Palearctic, Volume 1, Ostrich to Ducks. Oxford, UK: Oxford University Press. p. 3. ISBN   978-0-19-857358-6.
  9. 1 2 3 4 5 6 Hilty, Steven L.; Brown, William L. (1986). A Guide to the Birds of Colombia. Princeton, NJ, US: Princeton University Press. p. 67. ISBN   978-0-691-08372-8.
  10. ↑ Dunning Jr., John B. (2008). CRC Handbook of Avian Body Masses (2nd ed.). Boca Raton, FL, US: CRC Press. p. 32. ISBN   978-1-4200-6445-2.
  11. 1 2 3 Hancock, James; Kushlan, James A. (2010). The Herons Handbook. London, UK: A&C Black. ISBN   978-1-4081-3496-2.
  12. 1 2 3 4 5 Ridgely, Robert S. (1989). A Guide to the Birds of Panama: With Costa Rica, Nicaragua, and Honduras. Princeton, NJ, US: Princeton University Press. p. 67. ISBN   978-0-691-08529-6.
  13. 1 2 3 Kenefick, Martyn; Restall, Robin; Iayes, Floyd (2007). Birds of Trinidad and Tobago (2nd ed.). London, UK: Christopher Helm. p. 48. ISBN   978-1-4081-5209-6.
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