Fig. 1 in Effectiveness of Morphological Sex Determination in the East Asian Barn Swallow (Hirundo rustica gutturalis) on Spring Migration

Fig. 1. Frequency distribution of (a) streamer lengths (T6-T5) and (b) white patch lengths selected by stepwise discriminant function analysis for the sex determination of the East Asian Barn Swallow Hirundo rustica gutturalis. Black columns denote females and white columns denote males; curved lines are the expected normal distributions of measurements reconstructed for each sex.