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Birds

Catbird

Dumetella carolinensis · also called gray catbird, grey catbird

Least Concern → omnivoreinsectivore Temperate forestTemperate grassland

A catbird is a shy, slate-grey songbird that gives itself away with a sound no other North American bird makes quite so convincingly: a soft, nasal mew, exactly like a cat, from somewhere deep in a thicket. It is a quiet relative of the mockingbird, and it is one of the few songbirds smart enough to simply throw a cowbird’s egg out of its nest.

Overview

The gray catbird, Dumetella carolinensis, is a slim, dark grey bird of dense shrubs, thickets, and hedgerows across temperate North America. It eats insects in summer and berries through the colder months, and it belongs to the Mimidae, the mimic thrush family shared with the mockingbird and the thrashers.

A mimic that whispers

Like its relatives, the catbird weaves snippets of other birds’ songs into its own long, rambling warble, though more quietly and from deeper cover than a mockingbird. It even has a genuine “whisper song”, an intricate but barely audible version used at close range. Agitated, it cocks and flicks its tail while scolding from the bushes.

Beating the cowbird

The catbird is one of the few North American songbirds that reliably recognises and ejects a cowbird’s egg, pushing it out of the nest within a day or two — a defence most small hosts of this brood parasite never evolved.

Status

Least Concern — common and stable, comfortable in the scrubby, edge, and suburban habitat that is relatively abundant across its range.

Catbird: common questions

Why does the catbird sound like a cat?

Its signature call is a short, nasal, downward-sliding mew that closely mimics the sound of a cat, produced using the same vocal organ, the syrinx, that lets the bird also imitate other species. Unlike its mimicry of other birds, the cat-like mew appears to be one of the catbird's own natural calls rather than a copy of an actual cat, and it is used as a contact and alarm call, often the first clue that a catbird is nearby, since the bird itself usually stays hidden in dense cover.

Is the catbird a good mimic like the mockingbird?

Yes, though it is generally less flamboyant about it. As a member of the mimic thrush family alongside the mockingbird and the thrashers, the catbird readily incorporates fragments of other birds' songs, frog calls, and even mechanical sounds into its own long, rambling, warbling song, but it tends to deliver these phrases more quietly and less in the repeated, structured pattern typical of a mockingbird's song, and it often sings from deep inside a shrub rather than from an exposed perch, so its mimicry is easy to overlook even when it is extensive.

How does a catbird deal with cowbird eggs?

A catbird is unusually good, among North American songbirds, at recognising a brown-headed cowbird egg that has been slipped into its nest and simply pushing it out with its bill, typically within a day or so of it appearing, before investing further effort in incubating it. This egg-rejection behaviour is thought to have evolved because catbirds have coexisted with brood-parasitic cowbirds for a very long time, giving natural selection time to favour individuals able to spot and remove the mismatched egg, unlike many smaller or more recently exposed host species that accept cowbird eggs without resistance.

Where do catbirds go in winter?

Catbirds that breed across most of temperate North America migrate south for the winter, but generally not as far as many other songbirds, settling mainly in the southeastern United States, Mexico, Central America, and various Caribbean islands, where dense scrub and fruiting shrubs provide food through the cooler months. They tend to arrive back on the breeding grounds relatively late in spring and depart again relatively early in autumn compared with longer-distance migrants, spending a comparatively large share of the year on or near the wintering grounds.

Sources & further reading