Ebird Near is a module that allows access to information regarding where birds have been seen nearby. A Drupal site with this module (Ebird Near) , CCK, and the Location module enabled can use a node's location coordinates in an Ajax request to the Ebird API and subsequently retrieve and display a table of locations that are near, bird species at the locations, and a date of observation.
Users of Ebird Near must conform to the terms set forth by Cornell University in the Ebird API.
https://confluence.cornell.edu/display/CLOISAPI/eBird+API+Terms+of+Use
Notes:
Currently the way this works, only location cck fields that have been actively added to the node will work. In fact I had to disable locations by setting the min and max number of locations to 0 before getting this to work on my live site. I only allowed location name and the coordinate chooser (to keep it simple). The coordinate chooser is a must and latitude & longitude should be entered in decimal degrees.
Working Version:
A live demo is on the Western MD Birding website at http://www.westernmdbirding.com and you simply go there, click one of the two counties ("Allegany" or "Garrett"), choose a site from the selected county by clicking the link. Then note the 2 text form controls at the bottom of the information about the site. The limits are set to 20 days back and 20 miles away to keep from thrashing the Ebird database.