DUBUQUE, Iowa (AP) — Officials say speedy peregrine falcons are nesting again on a ledge of the Dubuque County Courthouse in Dubuque.

The Telegraph Herald reports that a female laid two eggs last week in a pea gravel nest set up by Dubuque County Conservation staffers. The nest and birds can be seen on a YouTube stream .

Officials say the pair first showed up in spring 2016, but their eggs were blown off the ledge. Conservation staffers soon put a wooden box filled with pea gravel on the ledge. The pair returned, but no new eggs were seen.

The birds returned last year, and one of their three eggs hatched.

Wildlife experts say the peregrine falcon are among the fastest of birds and may reach 260 mph (418 kph) as they dive on prey.

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Information from: Telegraph Herald, http://www.thonline.com