Wildlife in Crisis (203-544-9913/wildlifeincrisis.com), helps rehabilitate orphaned, sick and injured wildlife. The organization is always looking for volunteers and donations. The mailing address is P.O. Box 1246, Weston 06883.
Also in the area is Back to the Wild Rehabilitation Inc. (203-438-0618/backtothewildrehabl.com), which specializes in birds, primarily raptors (hawks, eagles, vultures, etc.) and specifically owls. The organization will also work with abandoned non-wildlife such as ducks, geese, parrots, and peacocks.