Visual Perception by
Dr. Robert Cook
(Comparative Psychology: A handbook)
The "Umvelt"
of different animals
Prey
Identification in Toads
Information on Echolocation in Bats
Startle
Response in Moths
Iinformation
on Weakly Electric Fish (background is not designed for visual
primates, however)

A
nice collection of different
types of optical illusions
Computerized stimuli for studying
sexual communication in fish