Brown-capped Tyrannulet

How to find it

Listen first, because it is hard to see in the forest. A short series of whistles with a pause after the first note is your cue. Check mixed flocks of small insect-eating birds, where it is a typical member. Look high in the canopy, but also along forest edges and openings, where it comes lower. A boardwalk trail such as the one in Cahuita National Park lets you stand still and let flocks pass, and one birder logged it there alongside Acadian Flycatcher and several antwrens.

How to recognise it

This is a tiny flycatcher, about 8 cm long and 7 g, with a short bill and a short tail.

Look for these marks:

- a brown cap

- a bold white eyebrow, and in Costa Rica the white eyebrows meet over the forehead

- a dark line through the eye

- olive upperparts

- bright yellow underparts, with faint olive streaking on the throat and breast

Juveniles have a paler, more olive crown and paler yellow underparts. Because the bird is so small and often high up, a few seconds of good light is usually all you get, so the eyebrow and cap pattern is the thing to look for first.

What it sounds like

Recording: Tommy Andriollo, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

It usually travels in pairs that join mixed flocks of small birds such as greenlets and honeycreepers. It searches foliage like a chickadee or an antwren, poking into curled dead leaves and often hanging upside down.

When a flock comes through, it is worth checking every small bird in it, because this tyrannulet is a typical member of these flocks. Pairs stay together, so when you find one, look for its partner.

Where it lives

It lives on the Caribbean slope of Costa Rica, in the canopy of tall humid forest. It comes down well along forest edges and openings, and into nearby secondary growth and partly cleared areas.

In Costa Rica it ranges from sea level to about 900 m, reaching that height locally on the slopes of the Central Volcanic and Talamanca ranges. It is not known from the drier lowlands west of the Río Frío. Across its wider range it also uses mature secondary forest, semi-open woodland and coffee plantations.

When to see it

Breeding in Costa Rica is recorded from June to August, based on fledglings and gonad data.

Similar birds

It was once treated as the same species as the Yellow-bellied Tyrannulet, and the two look very similar. They differ in plumage, voice and habitat, and they apparently do not interbreed where their ranges overlap in Costa Rica. In one area a birder first took a pair of Yellow-bellied Tyrannulets for Brown-cappeds, and elsewhere a tour group heard one calling out of sight and could not tell which species it was.

Names and lore in Costa Rica

The Costa Rican Spanish name is Mosquerito Gorricafé. Other countries use different names, such as tiranuelo cejón in Colombia and tiranolete gorripardo in Ecuador and Panama.

Status and conservation

The official Costa Rican bird list marks it as a resident (R), and the IUCN lists it as Least Concern, uncommon to fairly common across its range.