Black Phoebe

Overview

The black phoebe (Sayornis nigricans) is a medium-sized tyrant flycatcher about 16 cm long, with a striking and unmistakable pattern: sooty black head, throat, breast, back, and tail set off sharply against a clean white belly and lower flanks. The bill is short, black, and broad at the base. Sexes are alike; juveniles show rusty wing-bars and edges that fade in the first months.

The phoebe is one of the most water-tied songbirds in the Neotropics. It hunts from low exposed perches — a rock in midstream, a dock railing, a fence wire over a culvert — sallying out to take small insects from the air or directly off the water’s surface. Between sallies it returns to the same perch and pumps its tail down-and-up in a deliberate, repeated motion. That tail-wag is diagnostic: no other small all-black bird in Costa Rica does it. Mud-cup nests are plastered against vertical surfaces, often under bridges or eaves, and the species readily uses human infrastructure as substitute cliff habitat.

Why Tortuguero

Tortuguero’s slow-water canal system is not classic black-phoebe habitat — the species prefers running streams and a hard substrate for nest attachment. But it does turn up along the lagoon outflow at the river mouth, on dock pilings in the village, and around hotel buildings near open water. The phoebe is the most reliable tail-wagging black-and-white flycatcher around any open water surface here, and in the right spot a pair stays put for months at a time.

How to see them (honestly)

• Scan dock pilings, fence wires, and exposed rocks along the river mouth and main lagoon edges
• The downward tail-pump after landing is the field cue — no need to see the white belly first
• Most reliable in the first hours of daylight, when surface insect activity is highest
• Check culvert openings, bridge undersides, and dock structures from below — that’s where the mud nest goes
• Do not expect them inside the forest canals; they need open water and a perch over it

Status note

The IUCN rates Sayornis nigricans as Least Concern, with a vast Neotropical range and a population that has increased in parts of its range as it has colonized human water-control structures (bridges, culverts, irrigation canals). The species is one of the few Costa Rican flycatchers that benefits from a moderate human footprint, as long as the water itself stays clean enough to support flying insect prey. Tortuguero populations are small but stable.