Culicivora caudacuta
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~70% in a week ~90%
The sharp-tailed grass tyrant or sharp-tailed tyrant (Culicivora caudacuta) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. The short-tailed grass tyrant is the only member of its genus and has no subspecies. Its closest relatives are the tachuris of genus Polystictus.
The sharp-tailed grass tyrant is 10 to 11 cm (3.9 to 4.3 in) long. The sexes have almost the same plumage; females are slightly smaller than males with a shorter tail. Adult males have a slightly bushy blackish crown and females a browner one. Both sexes have a wide white supercilium and a thin black line through the eye on an otherwise warm buffy brown face. Their back and rump are buffy brown with wide blackish streaks. Their wings are buffy brown with black and pale buff streaks and edges. Their tail is highly graduated. The central feathers are stiff and most feathers' webs are quickly worn away at the ends, giving the tail a resemblance to those of Synallaxis spinetails. Their chin is white and the rest of their underparts mostly pale yellowish white with a warm cinnamon-buff wash... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra da Canastra National Park | 🇧🇷 Brazil | |
| 2 | Emas National Park | 🇧🇷 Brazil | |
| 3 | Chapada Diamantina National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Campo Grande | 🇧🇷 Brazil |
Possible
About 30% of wildlife watchers report a Sharp-tailed Tyrant sighting in Serra da Canastra National Park on a given day, based on 212 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 41st most-seen of the 294 birds we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
May and June
In those months about 50% of wildlife watchers report a Sharp-tailed Tyrant in Serra da Canastra National Park on a given day, against about 30% in February–April, July–August and October–November, the lowest months. Those are among Serra da Canastra National Park's driest months, with about 30 mm of rain a month against 280 mm in January.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Sharp-tailed Tyrant 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 3 parks where we can rate Sharp-tailed Tyrant sightings, Serra da Canastra National Park has the highest daily chance: about 30%. Next come Emas National Park (Brazil, about 30%) and Chapada Diamantina National Park (Brazil, under 5%).
Same family: Tyrannidae
The closest relatives of the Sharp-tailed Tyrant that you can see in Serra da Canastra National Park (family Tyrannidae, Tyrant Flycatchers) are Great Kiskadee (about 60%), White-rumped Monjita (about 50%) and Crested Black-Tyrant (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sharp-tailed Tyrant is recorded against all the birds logged in Serra da Canastra National Park (212 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.
