What is this on Wikipedia's web?

The delicate feelers of a roach

caught behind the screen?
What exactly is it? A piece

of a nun's habit, a headdress

she forgot to put on?
What? The  wing of an insect

torn off by an impatient child

trying to understand flight?
Maybe, the finely curved spine,

and wispy bones of a small

rodent, flesh rotted away.
A white linen cloth, and

a broken  napkin ring? I see

it is a book with open pages.
Like the British Sunrise on doors,

knowledge reigns over all

and is never completely set.