1965 Bill Army Journal July 24 One parent is in brooding position now, but stood upright when we arrived, just now has settled back. Nest 2 has 3 > 1/2 grown young. at 9:45 contains 1 parent, from which the 3 are actively begging. The parent has stepped away from them, onto a more exposed position on the cliff face. Nest 3 contains 1 large > 1/2 grown young, with one attendant parent. Nest 4 has 2-3 quiet young ~ 1/2 grown, one parent guarding at 9:53 AM. Nest 5 has one 2/3 grown young, w/ 2 attendant parents. Nest 6 has 3 1/2 grown young, one attendant parent at 9:55. Observations: 9:57 - 4 - young actively begging from parent 9:58 - 1- The crouched parent, opened mouth, raised off nest, flew away, making 2 or 3 half circles, then disappeared around point. The remaining parent, which is apparently less iridescent, now crouches over young. The young of nests 1 and 4 at least show pink gular sacs when seen from the exterior. When viewed head on they appear to resemble a mouth in open gape which may be its function in stimulating the parent to feed. It seems to be somewhat inflatable, and is most pronounced when begging.