Vireo flavoviridis
Silhouette: Caleb Gordon · PhyloPic
In 3 days ~40% in a week ~70%
The yellow-green vireo (Vireo flavoviridis) is a small American passerine bird. It is migratory breeding from Mexico to Panama and wintering in the northern and eastern Andes and the western Amazon Basin. The yellow-green vireo was formally described by the American ornithologist John Cassin in 1851 under the binomial name Vireosylvia flavoviridis. The specific epithet combines the Latin flavus meaning "yellow" and viridis meaning "green". The type locality is San Juan de Nicaragua. The yellow-green vireo is now placed in the genus Vireo that was introduced in 1808 by the French ornithologist Louis Pierre Vieillot.
Four subspecies are recognised: The adult yellow-green vireo is 14–14.7 cm (5.5–5.8 in) in length and weighs 18.5 g (0.65 oz). It has olive-green upperparts and a dusky-edged gray crown. There is a dark line from the bill to the red-brown... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica | |
| 2 | San Salvador | 🇸🇻 El Salvador | |
| 3 | Panama City | 🇵🇦 Panama | |
| 4 | Bogota | 🇨🇴 Colombia | |
| 5 | Managua | 🇳🇮 Nicaragua | |
| 6 | Guatemala City | 🇬🇹 Guatemala | |
| 7 | Monterrey | 🇲🇽 México | |
| 8 | Medellín | 🇨🇴 Colombia | |
| 9 | San Diego | 🇺🇸 United States | |
| 10 | Los Angeles | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Yellow-green Vireo sighting in San José on a given day, based on 2,947 verified sightings from GBIF citizen-science data. It is the 40th most-seen of the 379 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May and June
In those months about 40% of wildlife watchers report a Yellow-green Vireo in San José on a given day, against under 5% in November to February, the lowest months. Those are among San José's wettest months, with about 210 mm of rain a month against 20 mm in February.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Yellow-green Vireo sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 10 cities where we can rate Yellow-green Vireo sightings, San José has the highest daily chance: about 10%. Next come San Salvador (El Salvador, about 10%) and Panama City (Panama, under 5%).
Same genus: Vireo
The closest relatives of the Yellow-green Vireo that you can see in San José (genus Vireo, Vireos) are Philadelphia Vireo (about 10%), Yellow-throated Vireo (about 10%) and Red-eyed Vireo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-green Vireo is recorded against all the birds logged in San José (2,947 verified sightings), 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.
