Figure 2.

Chicken <i>Gallus domesticus</i> RAM R1 in right lateral view,
illustrating maximally extended pose and ONP: last four cervical and
first four dorsal vertebrae. Note the strong ventral deflection of the
base of the neck in ONP, contrasting with the very strong dorsal
deflection illustrated in a live chicken by Vidal et al. (1986:
fig. 7). Scale bar 5 cm.