This is a page or antique plate taken from a book titled Warrens Birds of Pennsylvania.
It is plate number 5 and it features a color image of the American Bittern. It has the birds numbered 1 for male & 2 for the female.
It measures 9 1/4" by 6" and it does show yellowing from age.
It is in good pre-owned condition and will make a great addition to any collection.