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Tropics to the Credit: Six Migratory Birds Returning This Spring

A Baltimore oriole in a tree.

Look for These Native Bird Species

The arrival of spring in the Credit River Watershed is more than a change in temperature. It marks the return of birds that have travelled thousands of kilometres from tropical forests to breed here.

As wetlands fill with sound and forests leaf out, these seasonal changes become part of a much larger story. From the Andes to Central America and the Caribbean, migratory birds are making remarkable journeys back to southern Ontario.

For a few short months, the forests, wetlands and river corridors of the watershed become critical breeding habitat for species whose migrations connect us to ecosystems around the world. With spring underway, keep an eye out for these six returning species.

Blackburnian Warbler

A small yellow bird perched on a thin tree branch.
The blackburnian warbler is about 12 centimetres in length and weighs between nine and 11 grams, only slightly more than the weight of two nickels.

Each spring, the blackburnian warbler returns from the Andes of northern South America after travelling up to 7,000 kilometres. One of the later-arriving warblers in May, it settles into mature forests across the Credit River Watershed, where it forages high in the canopy for insects.

Scarlet Tanager

A red bird with black wings, perched on a tree branch.
It’s about 16 to 19 centimetres long and weighs 23 to 38 grams, which is roughly the same weight as a golf ball.

After wintering in northwestern South America, the scarlet tanager migrates 5,000 to 6,000 kilometres to breed in Ontario. Males are bright red with black wings during breeding season, though they spend much of their time high in the canopy and can be easier to hear than see. Within the watershed, they rely on large, connected deciduous forests rich in insects.

Wood Thrush

A small brown and white bird, perched on a tree branch.
The wood thrush fills spring forests with its flute-like song after returning from Central America.

The wood thrush is between 19 to 21 centimetres in length and weighs between 40 and 50 grams, roughly the weight of a small chicken egg. It travels approximately 4,000 kilometres from Central America each spring. In the Credit River Watershed, it nests in mixed and deciduous forests with moderate understory vegetation.

Baltimore Oriole

A small orange and black bird, perched in a tree.
Baltimore orioles prefer to build their nests five and half to ten metres off the ground.

Travelling 4,000 to 5,000 kilometres from Central America and northern South America, the Baltimore oriole is one of the more recognizable spring arrivals due to their bring orange colouring. After reaching the watershed, it quickly begins building its woven, pouch-like nest high in trees. It’s often seen along rivers and deciduous forest edges, where emerging insects, berries and flowering trees provide important food sources.

Ruby-throated Hummingbird

A small bird, hovering in the air beside a bird feeder.
A ruby-throated hummingbird weighs only slightly more than a penny.

Despite its petite size, the ruby-throated hummingbird migrates more than 3,000 kilometres and many individuals fly up to 800 kilometres non-stop across the Gulf of Mexico. In the Credit River Watershed, it depends on nectar from early blooms and small insects to regain energy.

Indigo Bunting

A small blue bird standing on grass.
An indigo bunting’s brilliant blue feathers signal the return of warmer days in the watershed.

Measuring approximately 11 to 13 centimetres long and weighing between 12 and 18 grams, the indigo bunting weighs as much as a tablespoon of sugar. It migrates about 2,000 kilometres from Central America and the Caribbean. In the Credit River Watershed, it seeks out shrublands and brushy vegetation along meadow edges to breed.

Give a Warm Welcome

The arrival of migratory birds is a reminder that what happens in the Credit River Watershed matters far beyond our local landscape. The health of our forests, wetlands and waterways plays a direct role in whether these species can successfully rest, nest and raise their young.

Flowers with yellow petals and a black centre, growing among grass and herbaceous plants.
Plant native species like black-eyed Susan in gardens to attract birds like finches and sparrows.

Protecting habitat locally helps sustain migration routes that connect the Credit River Watershed to the wider world. Here are four simple ways you can help support migratory birds this spring:

By taking actions locally and supporting conservation efforts across the watershed, we can help ensure these remarkable journeys continue for generations to come.

Learn more about birds in the Credit River Watershed.

Share your migratory bird photos with us on Instagram, Facebook and X.

By Kimberley Laird, Associate, Marketing and Communications

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