Lark Sparrow

How to find it

Treat this bird as a bonus, not a target. Scan open, tree-poor country such as pastures, fields and roadsides in Guanacaste and the Caribbean lowlands. Check sparrow flocks for the face pattern and the white tail corners, and listen for the thin sit flight call. A Costa Rican guide notes that unbirded fields and pastures may hide more of them than we know. Because most records are one-day birds, a bird found by someone else may be gone the next day.

How to recognise it

Look for a fairly large sparrow, 15 to 17 cm long, with a striking face pattern.

- Chestnut ear patches and chestnut crown stripes

- White and black stripes framing the face

- Whitish breast with one dark central spot

- Long, rounded tail, dark with bright white corners

In flight the white corners look almost like a white band at the tail tip, so watch for it when a bird flushes from the ground.

Juveniles look like adults but have coarse dark streaks on the breast and flanks, and their upperparts show bolder black markings. The Savegre bird was in breeding plumage, so a sharp face pattern is what to expect on an adult.

What it sounds like

Recording: Michele Jones, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

Across its range the Lark Sparrow migrates in flocks of its own kind, or in mixed flocks with other sparrows, so a sparrow flock is worth a careful look. It forages on the ground or in low bushes.

In Costa Rica it is not a flock bird. The records are of single birds, and a Costa Rican guide says most were one-day birds that were not seen again. The Savegre bird sat 2 m up in a bush at the edge of secondary forest.

Where it lives

It lives in open areas with few trees. In Costa Rica it has been recorded in such country, in Guanacaste and the Caribbean lowlands.

Across its range it likes open country with scattered trees and shrubs, with pastures, farms and roadsides as typical spots.

The records reach beyond those two regions. One bird was at Savegre on Cerro de la Muerte, at 2,320 m, one in Puntarenas, and two in the Central Valley at Valle del Sol in San José.

When to see it

Rare and lost birds can turn up in Costa Rica in almost any month, and a local guide says November and December are the best months for them. Reported dates include 2 October 2007, November 2008 and December 2021.

Names and lore in Costa Rica

Costa Rica's official Spanish name is Sabanero Arlequín. A Costa Rican natural history site calls it Gorrión arlequín, and elsewhere it is also called Chingolo arlequín.

Status and conservation

The AOCR list marks the Lark Sparrow as M, a migrant, and a very rare one here; worldwide the IUCN rates it Least Concern.

Photography tips

The 2021 bird on the Palo Verde road was cooperative, so it allowed birders to see it. Because most Costa Rican records are single birds that do not stay, be ready to move quickly when a report comes in.