Journal of Comparative Physiology A

, Volume 196, Issue 10, pp 751–766

Pheromones in birds: myth or reality?

Review

DOI: 10.1007/s00359-010-0534-4

Cite this article as:
Caro, S.P. & Balthazart, J. J Comp Physiol A (2010) 196: 751. doi:10.1007/s00359-010-0534-4

Abstract

Birds are anosmic or at best microsmatic… This misbelief persisted until very recently and has strongly influenced the outcome of communication studies in birds, with olfaction remaining neglected as compared to acoustic and visual channels. However, there is now clear empirical evidence showing that olfaction is perfectly functional in birds and birds use olfactory information in a variety of ethological contexts. Although the existence of pheromones has never been formally demonstrated in this vertebrate class, different groups of birds, such as petrels, auklets and ducks have been shown to produce specific scents that could play a significant role in within-species social interactions. Behavioral experiments have indeed demonstrated that these odors influence the behavior of conspecifics. Additionally, in quail, deprivation of olfactory inputs decreases neuronal activation induced by sexual interactions with a female. It seems therefore well established that birds enjoy a functional sense of smell and a fast growing body of experimental evidence suggests that they use this channel of olfactory communication to control their social life. The unequivocal identification of an avian pheromone is, however, still ahead of us but there are now many exciting opportunities to unravel the behavioral and physiological particularities of chemical communication in birds.

Keywords

Avian olfactionSex recognitionSelf-odorKin recognitionImmediate early gene

Abbreviations

AA

Amyl acetate

BSTM

Bed nucleus of the stria terminalis, medial part

DMS

Dimethyl sulfide

EA

Ethyl acrylate

MHC

Major histocompatibility complex

OR

Olfactory receptors

POA

Preoptic area

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Department of BiologyUniversity of North CarolinaChapel HillUSA
  2. 2.Netherlands Institute of EcologyCentre for Terrestrial EcologyHeterenThe Netherlands
  3. 3.GIGA NeurosciencesUniversity of LiègeLiège 1Belgium