Originally Aired 10/6/08. A 4th cone in the retina of birds give them to ability to see in the ultraviolet spectrum. Richard Prum explains the implications of this structure in how birds view the world and one another.
[gtalert title=”Field Notes Archive” title_color=”#699bb1″ close_button=”no” border_style=”none” border_radius=”4″]Field Notes with Laurie Sanders aired from 1999 through 2009. It focused on the natural history of New England- from special habitats to the life cycles of individual plants and animals to profiles of people involved with safeguarding our environment. If you have a question about Field Notes please email: fieldnotes@nepr.net.[/gtalert]