The State of Connecticut is located in New England, which is part of the northeastern United States. Birds seen in this state, due to its small geographical area, will likely be seen in the surrounding states as well.

Here are a few links to bird information for the state of Connecticut:

List of Birds of Connecticut
Audubon Society
University of Connecticut Ornithology
A birder website : fatbirder

The Monk parakeet is mentioned below for the following reason - when visiting Stratford, CT, in 2014 I saw and heard those birds but it was too dark to take photos. When asked, people told me that there was a bird shipment that had an accident and the birds escaped, and since then they adapted locally. I was not able to verify this story with the town of Stratford.

GREAT CORMORANT (Phalacrocorax carbo)
GREAT EGRET (Ardea alba)
MONK PARAKEET – (Myiopsitta monachus)
NORTHERN MOCKINGBIRD (Mimus polyglottos)
RED-WINGED BLACKBIRD (Agelaius phoeniceus)
TURKEY VULTURE (Cathartes aura)