Red-eyed vireo

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Red-eyed vireo
Vireo olivaceus -Madison -Wisconsin -USA-8.jpg
In Wisconsin, North America
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Vireonidae
Genus: Vireo
Species:
V. olivaceus
Binomial name
Vireo olivaceus
(Linnaeus, 1766)
Vireo olivaceus map 2.svg
Synonyms
  • Muscicapa olivaceaLinnaeus, 1766

The red-eyed vireo (Vireo olivaceus) is a small American songbird. It is somewhat warbler-like but not closely related to the New World warblers (Parulidae). Common across its vast range, this species is not considered threatened by the IUCN.

Contents

"Vireo" is a Latin word referring to a green migratory bird, perhaps the female golden oriole, possibly the European greenfinch. The specific olivaceus is Neo-Latin for olive-green, from Latin oliva "olive". [2] [3]

Description and systematics

Adults are mainly olive-green on the upper parts with white underparts; they have a red iris and a grey crown edged with black. There is a dark blackish line through the eyes and a wide white stripe just above that line. They have thick blue-grey legs and a stout bill. They are yellowish on the flanks and undertail coverts (though this is faint in some populations[ which? ]).

In the past, the yellow-green vireo (V. flavoviridis), the chivi vireo (V. chivi), and the Noronha vireo (V. gracilirostris) have been considered to be conspecific with the red-eyed vireo; the chivi vireo was split most recently. Other closely related species include the black-whiskered vireo (V. altiloquus) and the Yucatan vireo (V. magister).

Measurements: [4]

Both sexes:

Song

Ecology

Bird in nest, Cook Forest State Park (Pennsylvania).
Photo by Vernon R. Martin Red-eyed-vireo-cook-forest-pa.jpg
Bird in nest, Cook Forest State Park (Pennsylvania).
Photo by Vernon R. Martin
Vocalizing red-eyed vireo Red-eyed vireo (35215).jpg
Vocalizing red-eyed vireo

The breeding habitat of the red-eyed vireo is in the open wooded areas across Canada and the eastern and northwestern United States. These birds migrate to South America, where they spend the winter. The Latin American population occur in virtually any wooded habitat in their range. Most of these are residents, but the populations breeding in the far southern part of this species' range (e.g. most of its range in Argentina, Uruguay, Paraguay and Bolivia) migrate north as far as Central America.

In northern Ohio, it seems to return to breed at about the same time as one century ago; but it may leave for winter quarters one or two weeks earlier at present than it did in the past. [6]

Red-eyed vireos glean insects from tree foliage, favouring caterpillars and aphids and sometimes hovering while foraging. In some tropical regions, they are commonly seen to attend mixed-species feeding flocks, moving through the forest higher up in the trees than the bulk of such flocks. [7]

They also eat berries, especially before migration, and in the winter quarters, where trees bearing popular fruit like tamanqueiro (Alchornea glandulosa) or gumbo-limbo (Bursera simaruba) will even attract them to parks and gardens. [8] Fruit are typically not picked up from a hover, but the birds often quite acrobatically reach for them, even hanging upside down. [9]

The nest is a cup in a fork of a tree branch. The red-eyed vireo suffers from nest parasitism by the brown-headed cowbird (Molothrus ater) in the north of its range, and by the shiny cowbird (M. bonariensis) further south. Parasitism by Haemoproteus [10] and trypanosoma might affect these birds not infrequently, as was noted in studies of birds caught in Parque Nacional de La Macarena and near Turbo (Colombia): though only three red-eyed vireos were examined, all were infected with at least one of these parasites. [11]

Vagrancy

The red-eyed vireo is a visitor to some western states, especially California. [12] This vireo is one of the more frequent American passerine vagrants to Europe, with more than one hundred records, mainly in Ireland and Great Britain.

Footnotes

  1. BirdLife International (2019). "Vireo olivaceus". IUCN Red List of Threatened Species . 2019: e.T155115462A137780032. doi: 10.2305/IUCN.UK.2019-3.RLTS.T155115462A137780032.en . Retrieved 12 November 2021.
  2. Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 281, 402. ISBN   978-1-4081-2501-4.
  3. "Vireo" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
  4. "Red-eyed Vireo Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-27.
  5. 1 2 3 Borror, D.J. (1981). "The songs and singing behavior of the red-eyed vireo". Condor. 83 (3): 217–228. doi:10.2307/1367311. JSTOR   1367311. S2CID   56367418.
  6. Henninger (1906), OOS (2004)
  7. Machado (1999)
  8. Foster (2007). Cymbopetalum mayanum (Annonaceae) is visited far less frequently.
  9. Pascotto (2006)
  10. Haemoproteus vireonis (Basto et al., 2006) and perhaps some other species (Londono et al., 2007).
  11. Basto et al. (2006), Londono et al. (2007)
  12. "Red-eyed Vireo "Vireo olivaceus" | Boreal Songbird Initiative". 25 February 2014.

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