Chilean Mockingbird or Northern Mockingbird?

Here's how to tell the difference

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Chilean Mockingbird

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Northern Mockingbird

Chilean Mockingbird

Mimus thenca

Also known as: Tenca

General appearance

The Chilean mockingbird, also known as Mimus thenca, typically has a brownish-gray coloration, speckled with small black spots. It is known for its long tail feathers, which are usually darker at the ends, and a pointed beak for eating insects and fruits. The eyes are bright yellow, providing stark contrast to the rest of the bird's muted colors.

Male vs female

The Chilean mockingbird shows little to no sexual dimorphism, meaning males and females look largely the same. Both genders share the same size and coloration. While it is difficult to differentiate between a male and female based on physical appearances alone, males usually perform elaborate songs and displays for courtship.

Juvenile

Juvenile Chilean mockingbirds have similar coloration to the adults but their plumage is softer and duller. Their eyes are brown before they turn yellow with age. They also tend to be slightly smaller than the adults until they reach full maturity.

Size

11.0 - 11.4 in/2.3 - 2.4 oz

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How to tell the Chilean Mockingbird from the Northern Mockingbird

Visual differences

Chilean Mockingbirds (11-11.4 inches, 2.3-2.4 ounces) have a brownish-gray color with black speckles and bright yellow eyes, featuring a pointed beak and darker, long tail tips. In contrast, Northern Mockingbirds (9-11 inches, 1.4-2 ounces) are pale gray with distinct white wing patches visible in flight and white outer tail feathers. Their beak is slimmer, and they have dark eyes. Overall, the Northern Mockingbird has a sleeker appearance compared to the more speckled and larger Chilean Mockingbird.

Key differences and behavior

The Chilean Mockingbird and Northern Mockingbird share a talent for mimicry, but exhibit distinct behaviors and preferences. The Chilean Mockingbird's song fills the air year-round, while the Northern Mockingbird is noted for singing especially during the day and sometimes under the full moon. Habitat-wise, Chilean Mockingbirds adapt to various environments from dry deserts to urban parks in Chile, whereas Northern Mockingbirds favor open farmlands and urban settings across Southern U.S. and Mexico. Both species share similar dietary habits, consuming insects and fruits, yet Northern Mockingbirds diversify more with occasional crayfish and lizards. Mating rituals for both involve vocal displays, but Chilean Mockingbirds are also noted for aerial acrobatics, whereas Northern Mockingbirds engage in chasing during courtship. Nesting for both occurs in dense shrubs, yet Chilean Mockingbirds incorporate more human-made materials in their nests. Both parents in each species participate in chick rearing, but Northern Mockingbirds begin nesting earlier in late winter.

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