It is very difficult to determine the sex of a pigeon. I used to keep pigeons as a kid so I’m good at it.
There are three ways to do it:
1 – Check their reproductive organs
Pigeons genitalia all look the same (they have ‘cloaca‘) so you will have to cut them open to actually see their reproductive organs. Not a very efficient method.
2 – See who goes on top
There isn’t much variation in the sex life of a pigeon. Males go on top. No Kama Sutra here. Fortunately all they do is eat and, ehm, reproduce. You won’t have to wait very long to see that happen. But you do need 2 pigeons and some patience.
3 – Look at their faces
Yes, pigeons have faces just like humans.
It takes years to be able to read the face of a pigeon. I kept pigeons as a kid so I can tell the sex of any pigeon just by looking at their faces for few seconds. Just like with most humans. Humans have the added benefit of clothing, hair and breasts. But even without that a face looks feminine or masculine.
Investors try to look under all those feathers but up close all excel sheets look the same. They try to see who goes on top but then you would have to wait until the entrepreneur meets an actual client.
But once you have met enough starting entrepreneurs one look at someones face is usually enough. You know what you have got and who is a good bet and who isn’t.
Just like with pigeons.