Many birds are monomorphic, meaning that they are difficult to tell the sex of by their plumage. These birds require sex determination to determine their sex. The most accurate method for sex determination is surgical sexing. This is a short laparoscopic procedure performed under general anaesthetic. This method is very safe and accurate.
Alternatively, a small blood sample can be collected by sterile means for a DNA test. This method of sex determination is very safe but is not as accurate as surgical sexing.