How many opsins are found in a hawk's eye? How does this make their sight different from that of humans?
1 Answer
Dec 21, 2015
Hawks have a fourth cone, one more than humans have, that contains opsins that allow them to see ultraviolet light. This allows them to track prey's urine trails which glow in ultraviolet.
The ultraviolet spectrum has a short wavelength than what's pictured.
Though not of a hawk, the European Starling's opsin are similar:
(Read more: rsc.org)
