Oporornis agilis
Silhouette: Andy Wilson · PhyloPic
In 3 days ~40% in a week ~60%
The Connecticut warbler (Oporornis agilis) is a small songbird of the New World warbler family. These medium-sized warblers measure 13–15 cm (5.1–5.9 in) in length, with a 22–23 cm (8.7–9.1 in) wingspan. Connecticut warblers weigh 10 g (0.35 oz) when they fledge, attaining an average weight of around 15 g (0.53 oz) as adults. However, birds preparing for migration pack on more weight to survive the strenuous journey and can weigh up to 25 g (0.88 oz). This species has light yellow underparts and olive upperparts; they have a light eye-ring, pink legs, a long tail, and a thin pointed bill. Males have a grey hood; females and immatures are more brown and have a whitish throat.
They forage on the ground, picking among dead leaves, or hop along branches. Like most warblers, these birds mainly eat insects and similar small invertebrates. They will also supplement their diet occasionally with seeds and berries. They are "skulking" birds that usually spend their time foraging within dense, low vegetation. Such behavior often renders them difficult to see well.
Despite its name, this bird only rarely visits Connecticut during migration. It was named by Alexander Wilson who... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Isla del Coco National Park | 🇨🇷 Costa Rica | |
| 2 | Henri Pittier National Park | 🇻🇪 Venezuela | |
| 3 | Riding Mountain National Park | 🇨🇦 Canada | |
| 4 | Point Pelee National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chicago | 🇺🇸 United States | |
| 2 | Baltimore | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Philadelphia | 🇺🇸 United States | |
| 5 | New York City | 🇺🇸 United States | |
| 6 | Detroit | 🇺🇸 United States | |
| 7 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 8 | Miami | 🇺🇸 United States | |
| 9 | Washington | 🇺🇸 United States | |
| 10 | Boston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Connecticut Warbler sighting in Isla del Coco National Park on a given day, based on 29 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 43rd most-seen of the 69 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
December
In that month about 50% of wildlife watchers report a Connecticut Warbler in Isla del Coco National Park on a given day, against under 5% in March–April and September, the lowest months. May and July–August have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Connecticut Warbler 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 4 parks where we can rate Connecticut Warbler sightings, Isla del Coco National Park has the highest daily chance: about 10%. Next come Henri Pittier National Park (Venezuela, about 10%) and Riding Mountain National Park (Canada, under 5%).
Same family: Parulidae
The closest relatives of the Connecticut Warbler that you can see in Isla del Coco National Park (family Parulidae, New World Warblers) are Yellow Warbler (about 60%), Northern Waterthrush (about 40%) and Black-and-white Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Connecticut Warbler is recorded against all the birds logged in Isla del Coco National Park (29 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.
