Vireo olivaceus
Silhouette: Andy Wilson · PhyloPic
In 3 days ~10% in a week ~30%
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.
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'). 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).
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... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manaus | 🇧🇷 Brazil | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Montreal | 🇨🇦 Canada | |
| 4 | João Pessoa | 🇧🇷 Brazil | |
| 5 | Bogota | 🇨🇴 Colombia | |
| 6 | Cali | 🇨🇴 Colombia | |
| 7 | Maceió | 🇧🇷 Brazil | |
| 8 | Washington | 🇺🇸 United States | |
| 9 | Edmonton | 🇨🇦 Canada | |
| 10 | Buenos Aires | 🇦🇷 Argentina |
With luck
About 10% of wildlife watchers report a Red-eyed Vireo sighting in Utría National Natural Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 142nd most-seen of the 154 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February, August and October
In those months about 10% of wildlife watchers report a Red-eyed Vireo in Utría National Natural Park on a given day, against under 5% in January, March, May, July, September and November, the lowest months. April, June and December have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Red-eyed Vireo sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
52nd of 101
Of the 101 parks where we can rate Red-eyed Vireo sightings, Utría National Natural Park ranks 52nd at about 10%. The best odds are in Voyageurs National Park (United States, about 60%), Riding Mountain National Park (Canada, about 50%) and Elk Island National Park (Canada, about 50%). All parks ranked.
Same order: Passeriformes
The closest relatives of the Red-eyed Vireo that you can see in Utría National Natural Park (order Passeriformes, Perching Birds) are Great-tailed Grackle (about 60%), Chestnut-backed Antbird (about 50%) and Flame-rumped Tanager (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Red-eyed Vireo is recorded against all the birds logged in Utría National Natural Park (5 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
