EXPERIMENTAL STUDIES ON HATCHING BEHAVIOR IN CHICK .2. EXTIRPATION OF RIGHT WING

The right wing of chick embryos, stages 17–18, was extirpated with a view to study the effect of the absence of the right wing on prehatching motility and hatching behavior. Half of the embryos which survived, hatched normally. Detailed observations on these embryos showed that they followed the typical sequence of behaviorial events from day 17 until hatching. The types of behavior patterns were strikingly similar to embryos with both wings intact. A comparison of the qualitative aspects of prehatching behavior showed an increase of head movements in embryos without the right wing. Copyright © 1968 Wiley‐Liss, Inc., A Wiley Company