Question: how to tell the difference between male and female coturnix quail?
Answer: Conversely, hens not only DO NOT have this, but once they've started laying, their vent will be far looser than their male counterparts. Male Coturnix quail have a white foam excreted by the gland above their vent when in breeding condition. A hen's vent is clear of foam and can be looser due to egg laying.