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In aerial conflicts among territorial insects, injury costs are not obviously high and contestants cannot physically ‘force the issue’. Resource-holding potential in these cases usually relates to morphological and/or biophysical determinants of flight performance and endurance rather than traditional parameters such as size and strength. However, success is sometimes related to body size. Males of...
Males of the dung flySepsis cynipsea(L.) (Diptera: Sepsidae) mate guard before copulation by mounting the female's dorsum upon her arrival at the dung. After completing oviposition, females walk off the dung and vigorously shake to attempt to dislodge the guarding male. Only males that succeed in remaining on the female's dorsum will establish genital contact and copulate. Males are smaller than females,...
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