eBird, an online tool for submitting bird observations, allows scientists to keep track of birds around the world. eBird now has over one billion bird observations from more than 700,000 people — most of them community scientists who care about their local birds. And as more people in more places join in, eBird becomes an even better way for researchers to understand birds. In this show, learn how you can make your birding more useful to science.

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A bird’s crest is made up of a slender array of feathers on top of their head. These feathers are a bit longer and can be spiked up or slicked back, depending on what the bird is trying to communicate. Even birds without crests, like crows or sparrows, sometimes puff up their short crown feathers.

More info and transcript at BirdNote.org.

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Sharp-shinned Hawks are swift, bird-catching predators. The male is jay-sized. The female stands a head taller and weighs almost twice as much. Female birds of prey are most notably bigger than males among hawk species that hunt very agile prey, such as other birds. The smaller male will tend to hunt smaller prey. The female takes somewhat larger prey, so together they can tap a wider range of resources.

More info and transcript at BirdNote.org.

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BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.