[Lexinom]

Order/genus/species are categories. Pigeon is a category on some level. Species is probably more granular as you've suggested. I don't know, I don't care, I should have used the word category.

Gotta run now.

[CarolinaGuitarman]

"Order/genus/species are categories."

I never said they weren't. Nor did I ever say that pigeon wasn't a category. I just simply corrected your error when you said there was only one species of pigeon.

Words have meanings.