Data for: Sex-specific activity and movement in the threatened marsh fritillary <i>Euphydryas aurinia</i>

Males were nevertheless less likely to be settled and more likely to fly than females. Displacement between successive captures was similar in the two sexes, but increased with the interval between captures in males and not in females, so male space use expanded over the season while female displacement showed no such increase. Mark–recapture estimates further indicate that the strongly male-biased capture ratio overstates the bias in the population.</p><p dir="ltr">Implications for insect conservation<br>Monitoring and habitat assessment should record sex, because capture numbers partly reflect behaviour rather than abundance.

The absence of a corresponding expansion in females suggests that conditions at a fine scale within occupied patches, and not patch occupancy alone, may matter for recruitment.</p>