Species at Risk

Canada Warbler

Canada Warbler

(Cardellina canadensis, or Wilsonia canadensis)

canada warbler

Status in Canada: Threatened

Status in Ontario: Special Concern

Status at SWCR: Rare breeding bird

The Canada Warbler is a small, brightly-coloured songbird with a blue-gray back and tail, and a bright yellow breast and throat. This migratory warbler is an uncommon but widespread summer resident in forests across much of Canada, including most of Ontario.

Quick Facts:

  • The main breeding range of Canada Warbler is farther north, and it occurs only in small numbers at the SWCR and other sites in Norfolk County.
  • It nests and forages on the ground in dense shrubby woodlands.

Threats at the St. Williams Conservation Reserve:

Habitat loss and Degradation: Specific threats are not well known, but potential threats at the SWCR are related to habitat degradation.

Activities that can damage critical Canada warbler habitat include:

  1. Activities that eliminate patches of dense understory or reduce structural complexity on the forest floor: Natural succession and canopy closure, excessive deer browsing.
  2. Activities that interfere with understory shrubs such as trail development, unauthorized plant collecting, trampling.
  3. Activities that can introduce or encourage the growth of invasive plants, such as off-trail ATV use, and illegal dumping.

St. Williams Conservation Reserve management practices:

  • Ongoing monitoring
  • Forest thinning activities
  • Invasive plant control
  • Enforcement of authorized trail use

What you can do to help:

  • Follow the code of conduct for recreational activities in the Conservation Reserve and know and respect the current trail-use regulations.
  • Clean you boots, bicycle tires, or ATV before and after visiting the SWCR or other natural areas to avoid spreading invasive plant seeds.
  • Report sightings to the SWCR CC, Bird Studies Canada  (www.ebird.ca  or 1-888-448-2473), or the Natural Heritage Information Centre.
  • Report unauthorized trail use or any illegal activity related to plants and wildlife to 1-877-TIPS-MNR (847-7667).

More information:

Species At Risk Public Registry Profile

Ontario Species at Risk Profile


Funding for this project was provided through the Species At Risk Stewardship Fund