Some start as early as 3-4 months, but they aren’t sexually mature until 6 months.
Even then, though, behavioral sexual expression is *really* diverse among pigeons.
My little COF boy started displaying at about 1-½, 2 months? As soon as he stopped making squeaky noises he started doing the bow-coo and warbling at me. He’s always been super expressive though.
Graham (voorburg hen) just turned 2 months and is already wackooing, tail dragging, and presenting to various objects.
I thought that person was asking about pigs.
Confusion.