Geothlypis philadelphia
Silhouette: Andy Wilson · PhyloPic
In 3 days ~10% in a week ~20%
The mourning warbler (Geothlypis philadelphia) is a small songbird of the New World warbler family. Mourning warblers are neotropical migrants native to eastern and central North America and wintering in Central and South America. They tend to be found in dense second growth forests. They are very similar to the MacGillivray's warbler in appearance, especially in females and immature birds, but their breeding range does not overlap into the west.
The "mourning" in this bird's name refers to the male's hood, thought to resemble a mourning veil. Mourning warblers are small songbird with yellow underparts, olive-green upperparts, a thin pointed bill and pink legs. Adult males have a gray hood, black lores and a black patch on the throat and breast. In the fall, this pattern becomes less bright and harder to distinguish from similar species; however they never have a broken eye ring. Females and immatures are gray-brown on the head with an incomplete eye-ring. They have a yellow-gray throat with a brown or olive tint to their breast. Both sexes can range from 10 to 15 cm (3.9–5.9 in) in length and 11–13 g (0.4–0.5 oz) in weight. Their wingspan is 18 cm (7.1 in). Other... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Medellín | 🇨🇴 Colombia | |
| 2 | San Antonio | 🇺🇸 United States | |
| 3 | Bogota | 🇨🇴 Colombia | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | San José | 🇨🇷 Costa Rica | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | Houston | 🇺🇸 United States | |
| 8 | Toronto | 🇨🇦 Canada | |
| 9 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 10 | Panama City | 🇵🇦 Panama |
Rare
Under 5% of wildlife watchers report a Mourning Warbler sighting in Tenorio Volcano National Park on a given day, based on 135 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 210th most-seen of the 444 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
December
In that month about 10% of wildlife watchers report a Mourning Warbler in Tenorio Volcano National Park on a given day, against under 5% in January to November, the lowest months. That is one of Tenorio Volcano National Park's wettest months, with about 420 mm of rain against 120 mm in April.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Mourning Warbler sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
12th of 39
Of the 39 parks where we can rate Mourning Warbler sightings, Tenorio Volcano National Park ranks 12th at under 5%. The best odds are in Gros Morne National Park (Canada, about 30%), Riding Mountain National Park (Canada, about 20%) and Cape Breton Highlands National Park (Canada, about 10%).
Same genus: Geothlypis
The closest relatives of the Mourning Warbler that you can see in Tenorio Volcano National Park (genus Geothlypis, Yellowthroats and Allies) are Olive-crowned Yellowthroat (about 10%) and Gray-crowned Yellowthroat (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mourning Warbler is recorded against all the birds logged in Tenorio Volcano National Park (135 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.
