Camptostoma imberbe
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~40% in a week ~70%
The northern beardless tyrannulet (Camptostoma imberbe) is a small passerine bird in the tyrant flycatcher family. It breeds from southeasternmost Arizona and Texas of the United States through Mexico and Central America to northwestern Costa Rica.
This species is found in light forests, cultivation and gardens with trees. The domed nest is made of plant fibre or leaves with a side entrance. The nest is placed by a tree fork. The typical clutch is two white eggs, which are marked with rufous and lilac mostly at the larger end. Incubation by the female is 14–15 days to hatching, with another 17 days to fledging.
The northern beardless tyrannulet is 10.2 cm (4.0 in) long, and weighs 7.5 g (0.26 oz). The head is dark brown with an erectile crest and pale supercilium. The upperparts are grey-green becoming paler on the rump. The wings are brown with yellow feather-edging and two whitish wing bars. The tail is brown, the throat grey, the breast yellowish, and the abdomen yellow. The bill is pinkish.
Sexes are similar, and this species always appears not as bright, especially with regard to the wing bars, as the closely related southern beardless tyrannulet, C. obsoletum, with which it was once considered conspecific. However, the two forms overlap without interbreeding in Costa Rica.
Northern beardless tyrannulets are active birds, feeding in a vireo or warbler-like fashion on insects, spiders and berries. The call is a loud whistled Fleeeeeerrr, sometimes broken up as a fleeer-it, or a flee-flee-flee-flee. In courtship, or when alarmed, the crests are raised, the tail flicked, and an excited call is made. Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Puebla | 🇲🇽 México | |
| 2 | Mexico City | 🇲🇽 México | |
| 3 | León | 🇲🇽 México | |
| 4 | Guadalajara | 🇲🇽 México | |
| 5 | San Pedro Sula | 🇭🇳 Honduras | |
| 6 | San José | 🇨🇷 Costa Rica | |
| 7 | Monterrey | 🇲🇽 México | |
| 8 | San Salvador | 🇸🇻 El Salvador | |
| 9 | Managua | 🇳🇮 Nicaragua | |
| 10 | Guatemala City | 🇬🇹 Guatemala |
Possible
About 20% of wildlife watchers report a Northern Beardless-Tyrannulet sighting in Cañón del Sumidero National Park on a given day, based on 106 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 75th most-seen of the 243 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.
January
In that month about 40% of wildlife watchers report a Northern Beardless-Tyrannulet in Cañón del Sumidero National Park on a given day, against under 5% in October, the lowest month. That is one of Cañón del Sumidero National Park's driest months, with about 10 mm of rain against 260 mm in June.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Northern Beardless-Tyrannulet sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 23 parks where we can rate Northern Beardless-Tyrannulet sightings, Cañón del Sumidero National Park ranks 3rd at about 20%, level with the leaders once rounded. The best odds are in El Triunfo (Mexico, about 20%) and Calakmul Biosphere Reserve (Mexico, about 20%).
Same family: Tyrannidae
The closest relatives of the Northern Beardless-Tyrannulet that you can see in Cañón del Sumidero National Park (family Tyrannidae, Tyrant Flycatchers) are Social Flycatcher (about 70%), Boat-billed Flycatcher (about 60%) and Dusky-capped Flycatcher (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Northern Beardless-Tyrannulet is recorded against all the birds logged in Cañón del Sumidero National Park (106 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.
