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Franklin's gull

Franklin's gull
In Calgary, Alberta
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Laridae
Genus: Leucophaeus
Species:
L. pipixcan
Binomial name
Leucophaeus pipixcan
(Wagler, 1831)
  Breeding
  Migration
  Nonbreeding
Synonyms

Larus pipixcan

Franklin's gull (Leucophaeus pipixcan) is a small (length 12.6–14.2 in, 32–36 cm) gull.[2] The genus name Leucophaeus is from Ancient Greek leukos, "white", and phaios, "dusky". The specific pipixcan is a Nahuatl name for a type of gull.[3][4]

Description

It breeds in central provinces of Canada and adjacent states of the northern United States. It is a migratory bird, wintering in Argentina, the Caribbean, Chile, and Peru.

The summer adult's body is white and its back and wings are much darker grey than all other gulls of similar size except the larger laughing gull. The wings have black tips with an adjacent white band. The bill and legs are red. The black hood of the breeding adult is mostly lost in winter.

Young birds are similar to the adult but have less developed hoods and lack the white wing band. They take three years to reach maturity.

Measurements:[5]

  • Length: 12.6-14.2 in (32-36 cm)
  • Weight: 8.1-10.6 oz (230-300 g)
  • Wingspan: 33.5-37.4 in (85-95 cm)

Distribution

Although the bird is uncommon on the coasts of North America,[6] it occurs as a rare vagrant to northwest Europe, south and west Africa, Australia and Japan, with a single record from Eilat, Israel, in 2011 (Smith 2011), and a single record from Larnaca, Cyprus, July 2006. At the beginning of 2017 has been observed also in Southern Romania, southeast Europe.[7]

Behaviour

They are omnivores like most gulls, and they will scavenge as well as seeking suitable small prey. In the spring, on rivers such as the Bow River large groups will float with the current, sipping the emerging insect hatch. The behaviour includes floating through a particular stretch and returning repeatedly to the same section.

Reproduction

The birds breed in colonies near prairie lakes with the nest constructed on the ground, or sometimes floating. The two or three eggs are incubated for about three weeks.

Naming

The bird was named after the Arctic explorer Sir John Franklin, who led an 1823 expedition in which the first specimen of Franklin's gull was taken.[8]

References

  1. ^ BirdLife International (2018). "Larus pipixcan". IUCN Red List of Threatened Species. 2018: e.T22694462A132553472. doi:10.2305/IUCN.UK.2018-2.RLTS.T22694462A132553472.en. Retrieved 20 February 2022.
  2. ^ "Franklin's Gull". All about birds.
  3. ^ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 224. ISBN 978-1-4081-2501-4.
  4. ^ Gray, Jeannie; Fraser, Ian (2013). Australian Bird Names: A Complete Guide. CSIRO Publishing. p. 122. ISBN 978-0643104693.
  5. ^ "Franklin's Gull Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-25.
  6. ^ Potter, E.F.; Parnell, J.F; Teulings, R.P. (1980). Birds of the Carolinas. The University of North Carolina Press. ISBN 9780807813997.
  7. ^ "Rombird - Păsări rare din România".
  8. ^ Gochfeld, Burger (March 9, 2009). "Franklin's Gull". Franklin's Gull - Bird of North America Online. Cornell Lab of Ornithology. Retrieved October 10, 2014.
Quelle: https://en.wikipedia.org/wiki/Franklin%27s_gull