Crissal Thrasher or California Thrasher?
Here's how to tell the difference
Crissal Thrasher
California Thrasher
Crissal Thrasher
Toxostoma crissale
General appearance
The crissal thrasher is a medium-sized bird, approximately the size of a Crow or Robin, ranging from 27 to 32 cm in length. The unmistakable part is its chestnut-colored undertail coverts which is highlighted by its black, gray, red, and white body. The bird has a strongly curved bill, a long, rounded and wedge-shaped tail. Its breast is plain, and it features a dark whisker mark. Eyes come in hues from dull gold to brown.
Male vs female
In the case of the crissal thrasher, both males and females have similar physical characteristics, with no significant observed differences between them in terms of coloration, size or other physical traits.
Juvenile
Juvenile crissal thrashers generally resemble adults, but they may have slightly less distinctive markings. The coloration of their undertail coverts may be a less vibrant chestnut and their eyes aren’t fully colored yet. They also have a slightly smaller and lesser curved bill.
Size
11.2 - 11.6 in/1.9 - 2.5 oz
There's more to learn about Crissal Thrasher
View full detailsCalifornia Thrasher
Toxostoma redivivum
General appearance
The California Thrasher averages 11-13 inches in length and flaunts a strongly curved bill, distinguishing it from other species. Its body is primarily plain, dark brown and an eyebrow is accentuated in a paler tone. Its dark eyes are noticable, supplemented by a buff wash on its belly. This bird is roughly the same size as a crow, sporting broad wings and a long tail that can be best described as rounded, or wedge-shaped.
Male vs female
Males and females of this species are similar in size and color; both are cloaked in the same shade of dark brown, and depict a similar face pattern with pale eyebrows and dark eyes. No sexual dimorphism is observed.
Juvenile
Juvenile California Thrashers resemble the adults but may display a faintly streaked chest, a belly with a buff wash, and their feathers can sometimes reflect a slightly grayer hue. As these birds mature, they acquire the solid, dark brown coloration that typifies the species.
Size
12.6 - 13.0 in/2.8 - 3.3 oz
There's more to learn about California Thrasher
View full detailsHow to tell the Crissal Thrasher from the California Thrasher
Visual differences
The Crissal Thrasher is 11-13 inches long, with a gray body, chestnut undertail, and dark whisker marks, and has gold to brown eyes. The California Thrasher is larger, 13-14 inches, dark brown with pale eyebrows, a buff-washed belly, and dark eyes. Both share a strongly curved bill, but differ in plumage patterns and undertail color.
Key differences and behavior
Crissal and California thrashers differ notably in their behaviors and habitats. Crissal Thrashers are more elusive, preferring dense desert stream areas and walking or running rather than flying; their soft song only emerges primarily from males defending territory. In contrast, California Thrashers are found in chaparral and suburban areas, and both sexes sing complex duets, often mimicking other birds from elevated positions. Diets are alike, both preferring insects and fruits, though California Thrashers are more adaptable, consuming seeds and acorns, and visiting bird feeders more readily. Nesting habits are similar, but Crissal Thrashers fiercely guard their nests against cowbirds. Weighing 78-93g, California Thrashers are heavier than Crissal Thrashers (53.2-70g), reflecting their robust diet and varied habitat. Both maintain year-round pair bonds and build nests collaboratively.
Still not sure? Here are more lookalikes!
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