At around 12 days old it is time to sexing ducks and pinion the ducklings. This can be a daunting task and if you’re not sure how to do this. It is best to do it with someone experienced or get someone to come and help you the first time.
Sexing is done by opening up the cloacae* and therefore it is also called vent sexing. Smaller bird species are being sexed using a microscopic probe. For the bigger birds like ducks, vent sexing works well as shown in the photos below.
* The body cavity into which the intestinal, urinary, and genital canals empty in birds, reptiles, amphibians, most fish, and monotremes. The cloaca has an opening for expelling its contents from the body, and in females it serves as the depository for sperm. Also called vent.
Full details are provided in the Downloadable eBook – “Exotic Ducks and Duck Ponds” available on the Welcome to Ducksworld page.