Swainson's Thrush vs American Robin

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

There's more to learn about Swainson's Thrush

View full details

American Robin

Turdus migratorius

How to recognise an American robin?

General appearance

The American Robin is about 10 inches (25 cm) in size, or the size of a robin. It has a brick-red chest and a gray back with streaks on the white chin. Additionally, small white spots are visible around its eyes, as well as usually on tail corners. The wings are pointed and the tail is rounded and square-tipped.

Male vs female

Males exhibit a slightly blacker head and richer colors compared to the females. Despite these differences, both genders feature the signature black, brown, orange, red, and yellow colors.

Juvenile

The juvenile American Robin can appear confusing, due to the heavy spotting below, mottling on the back, and pale marks on the face. However, a distinguishing feature to identify a juvenile is the reddish tinge visible on its chest.

Size

7.9 - 11.0 in/2.7 - 3.0 oz

Habitat

Primary habitat

The American robin's preferred habitats range from cities, towns, lawns, farmlands, and forests. Nesting sites are typically in trees and materials used include mud.

Additional range

American robins are found across most continents in summer. In arid southwest, they are found in mountainous coniferous forests and rarely in lowland suburbs. Winters are spent in wooded areas with good berry crops.

Range Map

What do American robins like to eat?

Natural diet

The American robin's natural diet consists primarily of invertebrates and fruits. During spring and summer, they predominantly eat insects, earthworms, and caterpillars. Insects provide protein necessary for breeding and raising young. As the seasons turn to fall and winter, robins focus more on fruits and berries such as those from wild cherry, dogwood, sumac, serviceberry, and crabapple trees. Their adaptable feeding habits allow them to thrive in various environments throughout the year.

Bird feeders

American robins are not frequent visitors to traditional bird feeders, which often supply seeds. However, they may be attracted to feeders offering foods that mimic their natural diet such as mealworms, suet with berries, and chopped fruit including apples, raisins, and blueberries. Robins are ground feeders and are more likely to consume these foods when they are placed on low platforms or directly on the ground. Using these foods can help attract robins to garden spaces and provide additional nutrition, particularly during the winter months.

What does an American robin sound like?

The American Robin's vocalizations include a song series of rich caroling notes that fluctuate in pitch, often sounding like "cheer-up, cheerily." The song's tones rise and fall rhythmically. Its call pattern is flat and undulating. The variety of noises it produces fit into types such as chirp/chip, flute, and whistle, providing a melodious soundtrack in its habitat.

Call

Audio by G. McGrane

Call

Audio by Richard E. Webster

/ CC BY-NC-SA 4.0

Call

Audio by Jonathon Jongsma

/ CC BY-SA 3.0

Song

Audio by Richard E. Webster

/ CC BY-NC-SA 4.0

Song

Audio by Jonathon Jongsma

/ CC BY-SA 3.0

Song

Audio by Richard E. Webster

/ CC BY-NC-SA 4.0

There's more to learn about American Robin

View full details

Swainson's Thrush

Tap To compare

American Robin

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

View full details

American Robin

Turdus migratorius

General appearance

The American Robin is about 10 inches (25 cm) in size, or the size of a robin. It has a brick-red chest and a gray back with streaks on the white chin. Additionally, small white spots are visible around its eyes, as well as usually on tail corners. The wings are pointed and the tail is rounded and square-tipped.

Male vs female

Males exhibit a slightly blacker head and richer colors compared to the females. Despite these differences, both genders feature the signature black, brown, orange, red, and yellow colors.

Juvenile

The juvenile American Robin can appear confusing, due to the heavy spotting below, mottling on the back, and pale marks on the face. However, a distinguishing feature to identify a juvenile is the reddish tinge visible on its chest.

Size

7.9 - 11.0 in/2.7 - 3.0 oz

There's more to learn about American Robin

View full details

How to tell the Swainson's Thrush from the American Robin

Visual differences

Swainson's Thrush is smaller (6.3–7.5 inches) than the American Robin (10 inches). The thrush has olive-brown upperparts, pale underparts with dark throat spots, and a distinctive eye-ring, while the robin features a brick-red chest, gray back, and white chin streaks. Swainson's Thrush possesses a short, straight beak, whereas the robin's beak is more robust. The robin also displays small white spots around the eyes and on the tail corners. These visual cues aid in distinguishing the two species.

Key differences and behavior

Swainson's Thrush and the American Robin both exhibit unique behaviors and preferences. Swainson's Thrush is elusive, often singing at dawn and dusk in coniferous forests, moving quietly to avoid detection. American Robins are more conspicuous and sociable, boldly foraging in open areas such as lawns and gardens. Both species migrate, but Swainson's Thrush prefers tropical forests in winter, while robins adapt to varying environments with abundant berries. Swainson's Thrush nests low in trees, with females building and both parents feeding chicks, focusing on insects and fruits. American Robins nest higher, sometimes in urban areas, with a preference for worms and insects in warmer months, transitioning to fruits in colder weather. Despite their diverse habitats and feeding habits, neither bird frequents traditional bird feeders but may visit feeders providing fruits and insects.