Thrush vs Swainson's Thrush

Thrush

Turdidae

How to recognise a thrush?

General appearance

Thrushes are songbirds known for their brown to blue-grey upperparts and white underparts often with spots or markings. They have medium to long tails, and their size varies from small to medium. Some species have orange or red underwings, visible in flight.

Male vs female

In many thrush species, males and females have similar plumage, making it difficult to distinguish between them. However, in some species, males may have more vivid coloration or distinctive markings compared to females. There's often sexual dimorphism in size, with males being slightly larger.

Juvenile

Juvenile thrushes can resemble their parents, but they usually have duller plumage and less clear markings or spots. They may also be slightly smaller in size until full maturity. Their bills tend to be shorter and their feathers softer and fluffier.

Size

5.7 - 13.0 in/0.8 - 5.9 oz

Habitat

Primary habitat

Thrushes typically inhabit wooded areas and forests in temperate regions, often gravitating towards dense undergrowth and shrubs.

Additional range

Their range may extend to gardens, parks, and similar urban spaces. Some species adapt to arctic and alpine conditions.

Range Map

What do thrushes like to eat?

Natural diet

Thrushes primarily consume insects, worms, and other invertebrates. They forage on the ground and are known for their ability to find earthworms by sight and sound. In the summer, their diet is rich in protein sources like caterpillars, beetles, and spiders. During autumn and winter, thrushes adapt to the availability of food by eating more fruits and berries, such as holly, rowan, and blackberries.

Bird feeders

At bird feeders, thrushes are less commonly seen than other birds, but they may consume suet and various seeds if available. They are also attracted to raisins, sultanas, and chopped apples. Providing a variety of fruits can attract them, especially in colder months when natural food is scarcer.

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Swainson's Thrush

Catharus ustulatus

Also known as: Olive-Backed Thrush, Russet-Backed Thrush

How to recognise a Swainson's thrush?

General appearance

Swainson's thrush is a medium-sized thrush with a length of about 16-20 cm and a wingspan of 30-33 cm. It is characterized by olive-brown upperparts, pale underparts with a buffy wash on the breast, and distinct dark spots on the throat and chest. The bird features a pale, prominent eye-ring, giving it a spectacled appearance. The legs are pink, and the bill is relatively short and straight.

Male vs female

Males and females of Swainson's thrush appear similar, making them difficult to distinguish visually. Both sexes share the same coloration and markings. The slight size differences are not noticeable without direct comparison.

Juvenile

Juvenile Swainson's thrushes resemble adults but tend to have more rufous tones in their plumage. They may exhibit more pronounced spotting across the breast and a slightly duller appearance overall. The eye-ring remains noticeable in juveniles, aiding in identification.

Size

6.3 - 7.5 in/0.8 - 1.6 oz

Habitat

Primary habitat

The Swainson's thrush primarily breeds in the far north and mountainous coniferous forests with leafy undergrowth. It also breeds in deciduous trees and thickets along streams on the Pacific Coast.

Additional range

During migration, it can be found in many different types of woodlands. In winter, it resides in tropical forests.

Range Map

What do Swainson's thrushes like to eat?

Natural diet

In North America, the Swainson's thrush primarily consumes a wide variety of insects such as beetles, ants, caterpillars, crickets, wasps, flies, moths, and others, along with spiders and other invertebrates. Berries and fruits account for over one-third of its diet during the summer. Its winter diet in the tropics remains not well documented, but the bird is frequently observed in fruiting trees, suggesting fruits may play a significant role.

Bird feeders

The Swainson's thrush is not commonly observed at bird feeders, as it prefers to forage in natural habitats. However, it may occasionally visit gardens where berry bushes are present or if insects are abundant.

What does a Swainson's thrush sound like?

The vocalizations of the Swainson's Thrush include a series of reedy, spiraling notes that inflect upward, creating a melodious, flute-like song. The call's pattern has a characteristic rising, undulating nature, with the chirp, chip, hi, whistle sounds further adding to the bird's rich aural profile. These distinctive sounds make their song immediately appreciable, exhibiting an evocative charm and a serene rhythm.

Call

Audio by Paul Marvin

/ CC BY-NC-SA 4.0

Song

Audio by Richard E. Webster

/ CC BY-NC-SA 4.0

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Thrush

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Swainson's Thrush

Thrush

Turdidae

General appearance

Thrushes are songbirds known for their brown to blue-grey upperparts and white underparts often with spots or markings. They have medium to long tails, and their size varies from small to medium. Some species have orange or red underwings, visible in flight.

Male vs female

In many thrush species, males and females have similar plumage, making it difficult to distinguish between them. However, in some species, males may have more vivid coloration or distinctive markings compared to females. There's often sexual dimorphism in size, with males being slightly larger.

Juvenile

Juvenile thrushes can resemble their parents, but they usually have duller plumage and less clear markings or spots. They may also be slightly smaller in size until full maturity. Their bills tend to be shorter and their feathers softer and fluffier.

Size

5.7 - 13.0 in/0.8 - 5.9 oz

There's more to learn about Thrush

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Swainson's Thrush

Catharus ustulatus

Also known as: Olive-Backed Thrush, Russet-Backed Thrush

General appearance

Swainson's thrush is a medium-sized thrush with a length of about 16-20 cm and a wingspan of 30-33 cm. It is characterized by olive-brown upperparts, pale underparts with a buffy wash on the breast, and distinct dark spots on the throat and chest. The bird features a pale, prominent eye-ring, giving it a spectacled appearance. The legs are pink, and the bill is relatively short and straight.

Male vs female

Males and females of Swainson's thrush appear similar, making them difficult to distinguish visually. Both sexes share the same coloration and markings. The slight size differences are not noticeable without direct comparison.

Juvenile

Juvenile Swainson's thrushes resemble adults but tend to have more rufous tones in their plumage. They may exhibit more pronounced spotting across the breast and a slightly duller appearance overall. The eye-ring remains noticeable in juveniles, aiding in identification.

Size

6.3 - 7.5 in/0.8 - 1.6 oz

There's more to learn about Swainson's Thrush

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How to tell the Thrush from the Swainson's Thrush

Visual differences

Thrushes are generally larger (5.7-13 inches) with brown to blue-grey upperparts and white underparts, often spotted, while Swainson's Thrush is medium-sized (6.3-7.5 inches) with olive-brown upperparts and pale underparts featuring a buffy wash and dark spots. Swainson's Thrush is distinguished by its prominent pale eye-ring and pink legs, with a short, straight bill. Thrushes have varying colors and longer tails. Both species have similar male and female appearances, but Swainson's juveniles show rufous tones.

Key differences and behavior

Thrushes, a diverse group with 174 species, inhabit temperate forests, while Swainson's Thrush prefers coniferous forests and migrates to tropical regions in winter. Swainson's Thrush often sings softly and moves while singing, making it tricky to locate. Both are insectivorous, but thrushes adapt seasonally, shifting to fruits like holly and rowan in colder months, while Swainson's sticks to berries even in breeding season. Thrushes court by singing and food presentation, whereas male Swainson’s establish territories via singing and display aggression to intruders. Thrushes have varied nesting habits in dense shrubs or trees, with both parents feeding chicks. Conversely, Swainson's nests range from low branches to 30 feet high, with nests built primarily by the female. Thrushes are less frequent at feeders but may be drawn to raisins; Swainson's avoids feeders, foraging in natural settings instead.