Frogs Call at a Higher Pitch in Traffic Noise

Male frogs call to attract females for mating and to defend territories from rival males. Female frogs of some species prefer lower-pitched calls, which indicate larger, more experienced males. Acoustic interference occurs when background noise reduces the active distance or the distance over which an acoustic signal can be detected. Birds are known to call […]

Acoustic interactions in broods of nestling birds (Tachycineta bicolor)

Studies of acoustic interactions in animal groups, such as chorusing insects, anurans, and birds, have been invaluable in showing how cooperation and competition shape signal structure and use. The begging calls of nestling birds are ideal for such studies, because they function both as a cooperative signals of the brood’s needs and as competitive signals […]

Birdsongs keep pace with city life: changes in song over time in an urban songbird affects communication

Animals in urban environments often must adjust their vocalizations to be heard over the din of anthropogenic ambient noise. Most studies of this process use current comparisons of environments that vary in ambient noise; here, we evaluate over time the effects of the urban environment on signal structure and salience. We show that white-crowned sparrow, […]

The influence of ambient noise on maternal behavior in a Bornean sun bear (Helarctos malayanus euryspilus)

Anthropogenic noise has become a pervasive feature of both marine and terrestrial habitats worldwide. While a comprehensive understanding of the biologically significant impacts of noise on wildlife is lacking, concerns regarding its influence persist. Noise is also a common feature in the zoological setting, and much can be learned regarding the species-typical response to ambient […]

Effect of ambient noise on parent–offspring interactions in tree swallows

Many recent studies suggest that increased ambient noise can disrupt acoustic communication in animals and might ultimately decrease their reproductive success. Most of these studies have focused on long-distance signals used in mate attraction and territory defence, but close-range acoustic interactions between parents and offspring may also be disrupted by noise and are closely linked […]