Understanding the human body is a team effort. That's where the Yachtel group comes in.

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This is Scientific Americans' 60-second science.

I'm Karen Hopkin.

Ecologists crouching quietly amidst vegetation, using binoculars to tally birds in a roost,

may soon be a charming relic of the past, because a new study shows that when it comes to getting an accurate avian headcount, aerial drones can do better.

In recent years, scientists who study wild populations are increasingly turning to remotely

piloted aircraft, otherwise known as drones, to monitor their animal of interest.

For example, drones are being used to attract pods of whales, or to keep an eye on African

elephant herds, and watch for

signs of poaching. Such remote surveys are generally considered highly cost-effective,

but it wasn't clear whether they're as accurate as old-fashioned feet-on-the-ground expert

evaluations. To find out, researchers in Australia set up a test. And so what we did was make some replica seabird colonies

where we knew the true number of individuals in each colony.

Jared Hodgson, of the University of Adelaide, led the study.

Using decoy-sized rubber ducks, the researchers laid out 10 colonies,

ranging in size from about 500 to more than 1,000

individuals. We then had experienced ground counters, make independent counts of those birds

...