Platzen, DirkMagrath, Robert D2015-12-132015-12-130962-8452http://hdl.handle.net/1885/77172Evolutionary models suggest that the cost of a signal can ensure its honesty. Empirical studies of nestling begging imply that predator attraction can impose such a cost. However, parents might reduce or abolish this cost by warning young of the presenceKeywords: alarm signal; begging behavior; nest predation; predation risk; vocalization; animal experiment; article; bird; controlled study; feeding; female; male; nesting; nonhuman; predation risk; predator; priority journal; vocalization; Animals; Animals, Newborn Alarm calls; Cost of begging; Nest predation; Nestling vocalization; Non-begging vocalization; Vocal communication200410.1098/rspb.2004.27162015-12-11