Flamingo foster fathers hatch an egg together at the San Diego zoo

After practicing with a fake egg, the fortysomething lesser flamingos join other same-sex animal co-parents

Two male flamingos have joined their kind's ranks of same-sex co-parents after hatching an egg together at the San Diego Zoo Safari Park.

The two foster dads are both in their 40s and are lesser flamingos, a species found in sub-Saharan Africa and western India, according to the zoo. The chick is also a lesser flamingo.