The Nature Society
Recreation, Birding, Backyard Birding, Purple Martins - The Nature Society. A Purple Martin organization established in 1962.
http://www.naturesociety.org/
Purple Martin Preservation Alliance
Recreation, Birding, Backyard Birding, Purple Martins - Purple Martin Preservation Alliance. Devoted to the preservation and recovery of the Purple Martin through hands-on conservation projects, management of existing breeding sites, and research.
https://www.purple-martin.org/
HUMMINGBIRDS - HUMMINGBIRD PHOTOGRAPHY
Recreation, Birding, Backyard Birding, Hummingbirds - Humabout Hummingbird Photography. Close-up photographs of hummingbirds, including nests and babies.
http://www.humabout.net/
North American Bluebird Society
The North American Bluebird Society is a non-profit education, conservation and research organization that promotes the recovery of bluebirds and other native cavity-nesting bird species in North America.
https://www.nabluebirdsociety.org/
hummingbirds.net
The Web's premier place to learn about hummingbirds.
http://www.hummingbirds.net/
A Bird's Home - BirdHouses & BirdFeeders
Bird feeders, Bird houses, architectural Birdhouses Feeders, Wild bird feeders, bird houses, bird baths, fountains and garden supplies at discount prices. Home of the Hampton Bay lower to fill Estate Birdfeeder.
http://www.abirdshome.com/
British Garden Birds
Recreation, Birding, Backyard Birding - British Garden Birds. Photographs, descriptions to aid identification, and notes on the birds that visit a suburban garden in Sheffield, England.
https://www.garden-birds.co.uk/