Birds of Connecticut

What birds are common in Connecticut?

The birds you are most likely to run into in Connecticut right now are Chimney Swift, Double-crested Cormorant, and Canada Goose. Birders reported 206 species across Connecticut on eBird during August 22–28, 2026 — the 18below are the ones that turned up on the most of those days, which is as close to “common” as sightings data gets.

• Chimney Swift Chaetura pelagica

  Reported on all 7 of the last 7 days

• Double-crested Cormorant Nannopterum auritum

  Reported on all 7 of the last 7 days

• Canada Goose Branta canadensis

  Reported on all 7 of the last 7 days

• European Starling Sturnus vulgaris

  Reported on all 7 of the last 7 days

• Common Tern Sterna hirundo

  Reported on all 7 of the last 7 days

• American Robin Turdus migratorius

  Reported on all 7 of the last 7 days

• Fish Crow Corvus ossifragus

  Reported on all 7 of the last 7 days

• Mallard Anas platyrhynchos

  Reported on all 7 of the last 7 days

• Tree Swallow Tachycineta bicolor

How this is measured: eBird publishes, for each day, every species reported anywhere in Connecticut. We count how many of the 7 days sampled (August 22–28, 2026) each species appears on and rank by that count — nothing here is estimated or modelled. Species tied on days are ordered by the total number of individuals in those records. Rarities work the other way round: rare bird alerts tell you when a bird that is not common shows up near you.