Texbirds is a listserv of Texas birders and ornithologists. The listserv has more than 2000 subscribers and generates between 20 and 50 posts per day. Most posts are sightings and reports from birders, such as the post Friday that stated Martins had been seen at Brazos Bend State Park, and then later on at a martin house in Pearland.
For a list of bird listserves in your region visit birdingonthe.net
Purple Martin Forum
The internet's gathering place for Purple Martin enthusiasts!