Publisher Summary Environmental noise can affect acoustic communication through limiting
the broadcast area, or active space, of a signal by decreasing signal-to-noise ratios at the …

Sensory information allows animals to interpret their environment and make decisions. The
ways in which animals perceive and measure stimuli from the social and physical …

Twenty years ago Pepperberg set out to discover whether large-brained, highly social
parrots were capable of mastering complex cognitive concepts and the rudiments of …

Department of Biology, University of Maryland, College Park, MD; apopper@ umd. edu One
of the “problems” in working with aquatic animals is that they are not nearly as easy to …

Abstract and Summary I. 7 vocalizations emitted in the predator context are defined in terms
of their function. The physical and physiological constraints on the evolution of the physical …

The comparative hearing of birds and reptiles should always be considered together. It is
clear from the vertebrate fossil record that birds and reptiles split over 200 million years ago …

Active space, that distance from the source over which signal amplitude remains above the
detection threshold of potential receivers, was determined for Red-winged Blackbird …

To be fed, a king penguin, Aptenodytes patagonicus, chick must identify the call of its
parents, in the continuous background noise of the colony. To study this recognition process …

Operant conditioning and a psychophysical tracking procedure were used to measure
auditory thresholds for pure tones in quiet and in noise for seven species of small birds—the …

Extracellular recordings of responses to tone‐burst stimulation were used to determine the
tonotopic organization of n. magnocellularis (NM) and n. laminaris (NL) in hatchling …