Figure 1.

Results of a literature search in the Web of Science (Thomson Reuters) for migration models using the keywords ‘migrat*’ and ‘model*’. We followed the definition of migration by Dingle (1996) and included only those theoretical studies dealing explicitly with seasonal or life-stage coupled migratory behaviour. This yielded more than 70 core publications with an enormous bias—models for birds and fish were most frequent, but invertebrates, amphibians, reptiles and mammals were heavily underrepresented in theoretical studies. Although this list of publications is probably non-exhaustive, the analysis most likely correctly identifies the taxonomic bias.