DuVal, E. H. 2003 15 April Journal Isla Boca Brava, Chiriqui, Panama female for one-she mobbed me using the "injured female" strategy where she flutters/falls diagonally away from the nest, often fluttering through low bushes for some time when she gets ~1 foot off the ground. She pauses for 5-60 sec., then flies back rapidly to the same or a different high perch to see if I'm still near the nest. All of this is accompanied by much wing-flicking. Nest E-13 (f=BOB) has one chick several days old and one egg. I noticed that the egg had two small holes in the more rounded end and I couldn't hear the typical tap-tap-tap of a hatching manakin within. So I carefully broke open the shell to see if the contents were developed. There was a fully- formed chick inside, dead and starting to decompose. Where did the holes come from? Could the mother have reduced her own brood by pecking it herself? At 18:00 I caught RGR (DU), and I took a good-sized hormone sample from him immediately.