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This is Scientific American 60-second science.'m Sabrina Imbler. Got a minute?

To our knowledge, there's no correlation between a man's singing ability

and his care and attentiveness as a father.

But any Pavarotti among the nightingales will serenade his mate while she sits on her eggs.

And after they hatch, he will visit the nest about 16 times each hour to feed their offspring.

Because, among nightingales, at least, the best singers also make the best fathers.

So finds a study in the journal BMC Evolutionary Biology.

Some 80% of birds practice bipedal care, meaning both the male and female rear their offspring together.

So it's crucial for a female bird to pick as a mate the most promising father, both genetically and behaviorally.

Female birds look for signs of fitness that range from the flamboyant plumage of the

peacock to the bizarre mating dances of birds of paradise. And for nightingales, it's the most

elaborate song that apparently wins the day. The average male has some 180 tunes in his repertoire.

These avian sinatra vocalize highly variable song types, including

buzzes, whistles, and trills. And such virtuoso singing seems to signal the female that this is

the guy she can count on. That is, when it's time to help raise the kids, he's not a flight risk.

Thanks for the minute.

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