When do bison have their babies?

Bison typically give birth to their calves in the spring, usually between April and June.

Here's why:

* Gestation Period: Bison have a gestation period of about nine months, so they give birth roughly in the spring after mating in the summer.

* Favorable Weather: Spring offers warmer weather and abundant food sources, making it the ideal time for calves to be born and grow strong.

* Survival: Newborn calves are vulnerable and need the best possible conditions to survive. The spring provides an abundance of grass and other vegetation for both the mother and calf to thrive.

However, it's important to note that the timing can slightly vary based on geographic location and specific environmental factors.