In the above paper,1 the legends for Figures 5, 6 and 7 should read as follows:
Fig. 5 Exp 16-d. Ataxia: left leg showing mobility and beat air pointlessly. Poult carries on with beating to try to stand up. This picture was taken after 14-hr of the hatch.
Fig. 6 Exp 16-d. Poult’s stable balance but inability to stand up. This picture was taken 24-hr after hatching.
Fig. 7 Exp 16-d. When chick tries to stand up, its legs open wider than before. This picture was taken after 40-hr of the hatch.
In the legends, “16-d” refers to the identification code of the chick.
We apologise for the errors.