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This is Scientific Americans' 60-second science.

I'm Steve Merski. Got a minute?

On May 9th, this year will be the first global big day. And the idea is to see if we have people all around the world on a single day looking for birds, how many birds can we find in 24 hours?

Chris Wood of the Cornell Lab of Ornithology in Ithaca, New York.

He's the project leader for eBird. It's an online database by which bird watchers anywhere on the

planet can upload their sightings and help increase the resolution of our information on

exactly what birds are hanging out where and when. I spoke with Wood on a visit to the lab in

April. What are called big days have been local events for counting birds, but the May 9th big

day is for the whole world. So the hope is that people in India, people in Iran, people in

Australia, many of whom are already using eBird, will enter birds that day and

see if we can, you know, can we find 3,000 species, 4,000 species? That's really the idea.

Just it's one day to go out and explore biodiversity and see, you know, see this amazing planet that we live on.

And is there going to be any kind of working up of that data for a particular reason?

Yeah, so what we'll do is we ask everybody to enter data into Ebert.

And by having those data in Ebert, we'll give us, you know,

insight into populations of birds at some level,

...