Riverside Wren

Overview

The riverside wren (Cantorchilus semibadius) is a species of bird in the family Troglodytidae, assessed as Least Concern by the IUCN. It is found in Costa Rica and Panama, where it inhabits dense vegetation and is monotypic, though it has historically been confused with the bay wren.

Identification

• Size: 13 to 14 cm in length with a weight of 17 g.
• Plumage: Adults feature a bright orange-brown crown, chestnut nape, back, and rump, and a blackish tail with buff-white bars.
• Markings: A black-over-white supercilium contrasts with a face streaked and spotted black and white, while underparts are pale gray with narrow black bars that appear buffy towards the rear.
• Song: Both sexes produce loud ringing phrases followed by different repeated sequences, accompanied by harsh churrs and clear tinkling notes.

Habitat

Found along the Pacific slope from Costa Rica's Gulf of Nicoya into western Panama, the species inhabits dense vegetation such as watercourses, swampy woodland edges, or steep precipices. It ranges in elevation from sea level to 1,200 m.

Diet

Foraging near the ground in pairs or family groups, the bird feeds on insects and other invertebrates. It occasionally joins mixed-species foraging flocks at army ant swarms.

Did you know?

The species constructs globular nests made of fine fibers that drape over a branch to form two chambers, often positioned over flowing water. It also builds 'dormitory' nests specifically for roosting.