Coryphistera alaudina
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~20%
The lark-like brushrunner (Coryphistera alaudina) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. The lark-like brushrunner is genetically most closely related to the firewood-gatherer (Anumbius annumbi), and they may be sister species.
The lark-like brushrunner is 15 to 17 cm (5.9 to 6.7 in) long and weighs 27 to 42 g (0.95 to 1.5 oz). It is an unusual furnariid that, as its name implies, resembles a lark with an erect crest. The sexes have the same plumage. Adults of the nominate subspecies have white around their eye that extends onto the ear coverts that are otherwise cinnamon-rufous. Their lores are dull brownish. Their forehead is rufescent brownish and their crown and crest very dark brown. Their back is pale dull brown with vague darker streaks on the upper part that become wider and darker on the lower back, rump, and uppertail coverts. Their crown has narrow blackish... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Impenetrable National Park | 🇦🇷 Argentina | |
| 2 | Iberá National Park | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Lark-like Brushrunner sighting in Iberá National Park on a given day, based on 55 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 210th most-seen of the 284 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.
August and December
In those months about 10% of wildlife watchers report a Lark-like Brushrunner in Iberá National Park on a given day, against under 5% in January–July and September–November, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Lark-like Brushrunner sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Lark-like Brushrunner sightings, Iberá National Park ranks 2nd at under 5%. The best odds are in El Impenetrable National Park (Argentina, about 20%).
Same family: Furnariidae
The closest relatives of the Lark-like Brushrunner that you can see in Iberá National Park (family Furnariidae, Ovenbirds and Woodcreepers) are Rufous Hornero (about 80%), Greater Thornbird (about 60%) and Yellow-chinned Spinetail (about 50%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Lark-like Brushrunner is recorded against all the birds logged in Iberá National Park (55 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.
