Identifying the intercourse of waterfowl The feminine Grey Teal could be the only intercourse to have cackling ‘laughing’ call. But, trouble can arise whenever determining the intercourse of harvested waterfowl, because behavior can not be seen. The intercourse of some types could be dependant on examining plumage. A species is reported to be ‘sexually dimorphic’ in the event that feminine may be distinguished from the male by plumage or body features. ( ag e.g.