This is bird note.

A typical bird nest will have maybe four to six eggs neatly arranged for a parent to hunker down on. Now meet the Greater

Ria, South America's largest bird. Rias are four to five foot tall

flightless birds that look a good deal like ostriches.

You can find between 50 and 80 eggs in one Ria nest,

but they're not all from the same set of parents.

male Ria's mate with several females. from the same set of parents.

Male Rias mate with several females and then build a single nest on the ground to hold

all the eggs from each of them.

Female Rias wander around during the breeding season and mate with different males laying eggs in each of their partners nests.

Males usually stay put after breeding and attend the nest, but a male Ria might recruit a lower-ranking male to look after his first nest

while he goes off to start another nest, now mating with a second set of females. As the Ria eggs are about to hatch, the chicks while still inside the egg, begin to make a curious whistle.

Imagine 50 or more, all whistling at once.

Sometimes young chicks like to nestle in the feathers of the male's back.

Good thing he has such a nice broad back for all those chicks.

For Bird Note, I'm Ashley Ahern. The you're