White-fronted Tyrannulet

How to find it

Scan high in the forest tops rather than at eye level, because this bird stays in the canopy. Look for small movement, since it switches perches often and may flick its wings. Listen for the sharp 'pseet' call, which can help you place a bird you cannot yet see. It is generally uncommon and inconspicuous, so give it time and keep checking the same stretch of canopy. Humid forest within its elevation range is the place to try.

How to recognise it

This is a small bird, olive above with a gray cap, yellowish underparts and two yellow wingbars.

The Costa Rica form adds details to look for:

- a slate gray crown

- a narrow pale eyebrow

- a white eyering

- white in front of the eye that joins across the forehead

That forehead patch is the mark that names the bird. Two Turrialba guides also advise noting where the two eyebrow stripes meet, and watching for a streaky breast and an orangish bill. In Costa Rica the pale wingbars are not very conspicuous and can look whitish rather than yellow, so the white forehead and the streaky breast are the better marks.

What it sounds like

Recording: Dan MacNeal, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

It is mostly a canopy bird that switches perches often and may flick its wings actively. It is also inconspicuous, so the best clue is small movement high in the treetops rather than a bird sitting in the open. It is generally uncommon, which makes it easy to pass right under without knowing it is there.

Where it lives

Across its range it lives mostly in the canopy of humid evergreen forest, in the tropical and subtropical zones. In Costa Rica it occurs at roughly 800 to 2,800 m elevation. The Costa Rica form ranges from the Cordillera de Tilarán in the north south into western Panama. A checklist for San Gerardo de Dota, at about 2,200 m in cloud forest, lists it.

Similar birds

It was long treated as the same species as the Rough-legged Tyrannulet of South America, and was split again as a full species in 2023, after studies found clearly different vocalizations. The South American bird has an olive crown, not a gray-blue one, and it lacks the white eyebrow stripe of the White-fronted. Its typical song also differs.

Names and lore in Costa Rica

In Costa Rica the bird is called Mosquerito Frentiblanco, a name that refers to the white forehead where the eyebrow stripes meet. It is also called Mosquerito de Zeledón, after Costa Rican naturalist José Zeledón. Elsewhere other names are used, such as Tiranuelo Cejiblanco in Colombia and Tiranolete Tarsirrasposo in Panama.

Status and conservation

The official Costa Rican bird list gives it resident status (R), and it is considered rare here, though the IUCN rates the species Least Concern.

Photography tips

Photographing a canopy bird that moves often is a matter of patience. Learn the white forehead, the streaky breast and the orangish bill first, since these are the marks Turrialba guides single out. A photographer's note on a South American bird also mentions a grey head, thick yellow wingbars and a pinkish lower bill.