All Birds are Regular

A featherless bird.
Now that's absurd!

What about a Hummingbird?
That's a regular.

A duck?
A bird that's a quacker.

New flying dinosaurs.

The word regular,

I shake my head. 

Nothing is.

All birds are regular,

Even the peacock.

Flying is preferred,

Except those irregular.

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Dedicated to DS Draeko.