Authentic Edo period original, c.1845, Japanese erotic art shunga woodblock print picture by an artist of the UTAGAWA School.  From the shunga series, Uotori (fish & bird) ajiwai (taste) kurabe (comparison).  An interesting - and if not odd - shunga with each scene in the book comparing the sexual organs/acts of the lovers to either fish and/or birds.  Hence, the animal cartouche at the top corner of each shunga picture.  The author is Insuitei. 
Shunga woodblock print picture measures 17.5 cm x 21.6 cm.  Very good colors and impressions.  Condition is very good with some light wear and soiling, wormage at bottom border.  No backing.  Please see and judge from photos.
 
A great-looking shunga woodblock print picture of two lovers readying for intercourse on a spring day.