Hi,
bn, From
The Birds of America ,,, by James John Audubon, Philadelphia, 1832:
Link It's also known as the Mottled Owl. Yours appears to be from
The Birds of America, the
Amsterdam Edition (not the Havell Edition).
Link The plate size should measure 24 1/2 x 19 7/8 inches and overal measurement is 26 3/4 x 39 7/8 inches (approx).
If this were an authentic hand colored Havel, the paper would be watermarked with J Whatman and would be plate 97. To look for a watermark, hold it up to the light. Also, compare the plate size and overall size to this one:
Link Here is the Havell Edition of Plate: 97 (XCVII) "Mottled Owl" on the site of a well-known dealer in Audobons:
Link Hope this helps.
m