Erratum to: Evol Ecol DOI 10.1007/s10682-007-9173-9

On pages 8 and 9 the following text “We have plotted the two modifications of the baseline version that we visually judged to fit the hybrid zone best, the 4 times multiplication from Fig. 4 (Fig. 7a) and alternative 4 from Fig. 5 (Fig. 7b).” Should read:

“We have plotted the two modifications of the baseline version that we visually judged to fit the hybrid zone best, the 4 times multiplication from Fig. 5 (Fig. 7a) and alternative 4 from Fig. 6 (Fig. 7b).”

On page 9 the following Fig. 7 caption “Fig. 7 The simulation clines that agreed best with field data. a) shows case 4 from Fig. 4, b) shows case 4 from Fig. 5” should read:

Fig. 7 The simulation clines that agreed best with field data. a) shows case 4 from Fig. 5, b) shows case 4 from Fig. 6.