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“Athena”—the female peregrine falcon at the High Bridge power plant nest box—laid her first egg of 2007 on Sunday, April 15. Peregrines usually lay three or four eggs each year, so we'll be watching for more in the next few days.

Athena's first egg, 2007: Hard to see, but it's there. (It's the orange blob by her foot.) Congratulations, Athena.

The male and female falcons share the 33-day incubation duties, which include turning the eggs regularly. (The birds don't incubate the eggs in earnest, though, until they've laid all the eggs they're going to lay.) If all goes well, the baby peregrines will hatch sometime in the second half of May.

You can get daily updates here on Science Buzz, or get hourly updates by visiting Xcel Energy's High Bridge daily photos page.

Falcon chicks: Baby peregrines are helpless when they hatch, but they grow at an astonishing rate. (Courtesy US Fish and Wildlife Service)

More on peregrines from Science Buzz...