Crissal Thrasher

About the Crissal Thrasher

A large, plain, long-tailed thrasher in uniform gray-brown, with a heavy strongly downcurved bill and a chestnut patch under the base of the tail that gives the bird its name - crissum being the term for that area. Unlike the Curve-billed Thrasher it shows no spotting on the breast and its eye is dark rather than orange, and it looks longer and lankier overall.

It is a skulker of the first order. Crissal Thrashers spend their time inside dense brush, running between thickets on the ground rather than flying across the open, and even in areas where they are common they can go unseen for hours. The bill is a digging tool: they hammer and sweep at leaf litter and loose soil, turning it over for insects.

The song is the reward for the patience - a rich, varied, musical warble delivered from a hidden perch, sweeter and less harsh than other desert thrashers, usually at first light. The call is a distinctive rolling toit-toit that is often the only evidence a bird is present at all.

In Texas this is a Trans-Pecos species, at home in the mesquite and thorn scrub of desert washes and the brushy lower canyons of the Big Bend country. Finding one usually means standing still near thick cover and letting the bird come out on its own terms.