Federation of Ontario Naturalists - Conservation group for Ontario's wetlands, woodlands, and wildlife. Includes Important Bird Areas project, list of birding festivals, and overview of 16 nature reserves.
Haldimand Bird Observatory - Operates banding stations in Selkirk, Ruthven, and Rock Point. Volunteer opportunities, how to band a bird, sightings, and photos.
Hamilton Naturalists' Club - Meetings, field trips, bird hotline, birding guide, Peregrine Falcon webcam, and checklists.
Hawk Cliff - Details on a hawkwatching site near Port Stanley and information on the Hawk Cliff Foundation.
Holiday Beach Migration Observatory - Studies migration of raptors and other birds at Holiday Beach in Essex County. Photos and raptor count summaries.
Jean Iron's Photos - Digiscoped photos of rare and common birds, mostly from Ontario.
Kingston Field Naturalists - Local nature club with about 450 members. Meetings, newsletters, checklists, outings, projects, and links.
Long Point Bird Observatory - Field station on the north shore of Lake Erie, with sightings, migration monitoring, checklist, summer birds, Tree Swallow study, waterfowl and wetlands research, young ornithologists' workshop, and volunteer opportunities.
Nature Stuff - Birds and Birding - Birding locations, what birds to expect, tips on bird feeding and naturalizing your yard, and information about the Prince Edward County Field Naturalists and Quinte Field Naturalists.
NeilyWorld - Birding - Larry Neily offers a birdfinding guide for the Ottawa area, Ottawa eco-news, rare bird alert, and links.
ONTBIRDS - Archive of e-mail group for Ontario bird sightings.
Ottawa Field-Naturalists' Club - The oldest natural history club in Canada. Birding section includes recent bird sightings, count results, Peregrine watch reports, local birding sites, detailed site guide for Britannia Conservation Area, and seasonal Ottawa-Hull checklist.
Peel Birding Class - Class offered by Brete Griffin, Peel District School Board, Mississauga. Field trips, sightings board, and conservation.
Pembroke Area Field Naturalists - Birdfinding guide, weekly occurrence bird checklist, photos, butterfly checklist, bird and dragonfly count results, and field trips.
Prince Edward Point Bird Observatory - Banding station at the eastern tip of Prince Edward County, with events, banding reports, and species accounts.
South Peel Naturalists' Club - Based in Mississauga, with field trips, meetings, bird sightings, checklist, and hotspots.
Thunder Bay Field Naturalists Birding Page - Information about projects and the Thunder Cape Bird Observatory bird banding station at the southern tip of the Sibley Peninsula. Rarities, banding reports, Saw-whet Owl migration monitoring, MAPS site, and overview.