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There are two variants of female cuckoos: a gray morph that looks like a sparrowhawk, and a rufous morph.

"Then the advantage of the rufous morph comes into play, as it is less common and has not been learned by the hosts," says Wolf.

Gabriel Chaile's artwork depicts the unique nest of the Rufous Hornero bird, a national emblem of Argentina, with the bird known for building homes on high surfaces such as light poles and monuments.

“For their body size, hands down, the most aggressive bird is the rufous hummingbird.”

We rarely get the rufous in the Washington area, but we do get its cousin, the ruby-throated hummingbird.