Chilean Mockingbird or Tropical Mockingbird?

Here's how to tell the difference

Chilean Mockingbird image 1

Chilean Mockingbird

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Tropical Mockingbird image 1
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Tropical 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 Tropical Mockingbird

Visual differences

The Chilean Mockingbird (11-11.4 inches, 2.3-2.4 oz) is larger than the Tropical Mockingbird (9-10 inches, 1.5-2.1 oz). The Chilean has a brownish-gray speckled body with bright yellow eyes, and its tail is darker at the ends. In contrast, the Tropical is gray with lighter underparts, has white wing patches visible in flight, a long tail with white edges, and a black slender, slightly decurved beak. Both species show little sexual dimorphism but differ in their specific plumage patterns and coloration.

Key differences and behavior

The Chilean Mockingbird (Mimus thenca) and Tropical Mockingbird (Mimus gilvus) share some similarities but exhibit distinct behavioral traits. The Chilean Mockingbird is a prolific mimic, continuously vocalizing a repertoire of sounds, while the Tropical Mockingbird, although a singer, seldom mimics others. In terms of habitat, the Chilean species adapts to varied environments, from deserts to urban parks in Chile, whereas the Tropical Mockingbird frequents open woodlands and urban regions across Central and South America. Both species construct open cup nests in shrubs, but Tropical Mockingbirds involve offspring from previous broods in feeding the young, a behavior less noted in Chilean Mockingbirds. Diet-wise, both birds consume a mix of insects, fruits, and sometimes seeds. However, the Chilean Mockingbird is more versatile in diet adaptation, even partaking in bird feeder offerings similar to its natural diet. These behavioral nuances aid in distinguishing the two species in the field.

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