although it is generally believed that the central projections of the retina in birds are entirely crossed , using wheat germ agglutinin-conjugated horseradish peroxidase ( wga-hrp ) as an anterograde tracer , we have found that in normal posthatched chicks there is a small ipsilateral retinofugal projection to the diencephalon and midbrain .
C0019941
horseradish
C0078473
wga-hrp