The men must prevent an egg from being fertilized by another man at the time of ovulation.

That is the only way to know for sure in a few weeks they do not help feed the offspring of another man …

 

 

So if she flies up (because some stupid hobby photographer comes too close), he must immediately follow her …

 

 

They then make a lot of noise to tease me …

 

 

A nice opportunity to play with my photo equipment …