Friday, March 3, 2023
HomeNatureGet To Know This Yr's Featured World Migratory Fowl Day Species: Swainson's...

Get To Know This Yr’s Featured World Migratory Fowl Day Species: Swainson’s Thrush

Swainson's Thrush on branch


  • Widespread title: Swainson’s Thrush
  • Latin title: Catharus ustulatus
  • Vary: Breeding grounds span the Southern half of Canada and migrate all through the US.
  • Lifespan: 2-10 years
  • Dimension: Size ranges from 16-19 cm, and wingspan ranges from 29-31 cm.
  • Inhabitants estimate: Estimated inhabitants of over 50,000,000 breeding people in Canada1.


The Swainson’s Thrush has a medium brown color, however with a  comfortable, pale, and noticed underbelly. They’ve white markings that stretch in between their eyes, just like the look of spectacles. Breeding usually happens in coniferous forests, however throughout migration durations, people can dwell in a wide range of habitats. Food regimen throughout breeding seasons consists primarily of bugs and arthropods akin to ants, beetles, caterpillars, flies and grasshoppers3. Within the Fall and Winter, they have a tendency to eat fruits, notably elderberries, blackberries, raspberries, twinberries, huckleberries, and others. When looking prey, birds perch on low-lying branches and dive into the leaf litter beneath3. The species consists of two subspecies, russet-backed and olive-backed. Russet-backed thrushes have plumage with a reddish tint in comparison with the olive-backed, that are extra brown2.


Although having a comparatively steady inhabitants, the Swainson’s Thrush is negatively affected by habitat loss via human interactions akin to logging and clearing for growth. It has additionally been proven to be extra prone to constructing and window collisions throughout migration1. In accordance with the North American Breeding Fowl Survey, the inhabitants has decreased by about 38% between 1966 and 20142. Vital threats happen within the destruction of their breeding habitats within the type of invasive plant species and human exercise. Like many others, the Swainson’s Thrush is predicted to be harshly impacted by local weather change, dropping as much as 48% of its recurring vary if international temperatures enhance by 2 levels celsius4.


The Swainson’s Thrush is just not acknowledged by COSEWIC however was categorized as being a species of “least concern” beneath IUCN World1. It’s also a precedence species in accordance with the Fowl Conservation Area Methods, within the Northern Rockies area1. The species was designated “safe” in accordance with the Wild Species Canada 2010 report1. Swainson’s thrush was given a ranking of 10/20 on the Continental Concern Rating2.


When you dwell of their vary, offering tree and shrub cowl, avoiding chemical pesticides and accumulating leaf litter are all methods of creating an attractive habitat for this species. Advocating for the preservation of wildlife habitats and towards urbanization is one other smart way to assist many species, not simply the Swainson’s Thrush.

Become involved with an area Fowl Workforce in your neighborhood to work in direction of changing into Fowl Pleasant Metropolis Licensed.

Host and take part in an upcoming World Migratory Fowl Day occasion close to you!

  1. 1Canadian Wildlife Service Waterfowl Committee. 2015. Migratory Birds in Canada.
  2. 2The Cornell Lab, 2019. All About Birds, Swainson’s Thrush content=Duringpercent20fallpercent20andpercent20springpercent20migration,floorpercent20topercent20catchpercent20insectpercent20prey.
  1. 3McLaughlin, J. 2021. “Catharus ustulatus” Animal Variety Internet.
  2. 4Kaufman, Okay. n.d. Swainson’s Thrush. Nationwide Audobon Society.



Please enter your comment!
Please enter your name here

Most Popular

Recent Comments