Catharacta maccormicki. other to a far greater extent than the pomarine chicks. The interaction between the chicks should be watched, especially when a third chick is brought in. The establishment of a peck order would be significant + necessary when food is limiting to means that the available food would be used to ensure survival of at some bride rather than to partly support all of them. This of course would be essential to a semi colonial, flocking bird + superfluence in a territorial one as the longest parasite, or the pomarine. In bred hostility of one chick to another would also be important. Would result in death of one only if weight advantage allowed it. In time of advent, this would occur + ensure survival or give minimum chance for survival to one chick. In this app. the hostility seems manifest even when chicks are well fed or none are. This not true of pomarine chicks. Thus the fusion of to shan rearing only one chick could be selected for in this way; not by the parents clobbering the young as Murphy suggested. Dec 28 One obvious thing should be noted down. There is still a shortage of food among