J Comp Physiol B (2003) 173:549–557

In the list of abbreviations, the flow of water vapour in the excurrent air should have been defined as \( {\text{\.{V}e}}_{{{\text{H}}_{{\text{2}}} {\text{O}}}} \). In addition, in the Introduction, the correct citations are Biewener et al. 1998 and Thompson et al. 1980.