Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!comp.vuw.ac.nz!massey.ac.nz!AChamove From: AChamove@massey.ac.nz (A.S. Chamove) Newsgroups: rec.birds Subject: feeding-rate Message-ID: <948@massey.ac.nz> Date: 5 Sep 90 01:55:06 GMT Organization: Massey University, Palmerston North, New Zealand Lines: 9 X-Reader: NETNEWS/PC Version 2.1 We have noticed that in monkeys, the parents give food to their offspring as a function of how hungry the offspring are. That is, the more the infants beg, the more often they are fed. Is there any evidence that birds do the same? Do the parents return to the nest more frequently or collect food more, the more the chicks beg? arnold