We all know what sells in Advertising.

The newest is an American Copper, then 3 photos of Painted Ladies.

Also, the Monarch butterfly is a male. (currently #20)

For reference purposes, it would be better if DPReview would number from the beginning of a gallery and then simply add up as new photos are uploaded. By making the last photo #1 of the gallery series, the photo reference #'s are always changing as new photos are added to the gallery.