Abstract
The sex of 306 Mourning Dove (Zenaida macroura) chicks from 153 two-egg clutches laid during March–August 1984 was determined by gonadal inspection. Sex of offspring was unrelated to egg sequence over the entire breeding season. There was, however, a seasonal effect on the sex versus egg sequence pattern, particularly in broods with both sexes: during the middle of the breeding season males predominated in first eggs and females in second eggs but this pattern was reversed late in the season. All other comparisons, i.e., overall sex ratio, seasonal changes in sex ratio, binomial distribution of family types, and the relation between egg size and offspring sex, were nonsignificant.
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