At this time, three shakers belonging to this series have been discovered: mallard ducks, pheasants, and squirrels.  Each animal is raised along with the surrounding tree trunk and place in front of a central pictured / painted scenic like setting.  The sets stand 4'' in height with 3 and 2 pour holes.  A correct pair also has the animals facing each other.  Each set is stamped in green "Japan".  These were imported likely in the 1950s-60s.

Does anyone have any additional examples to bring this series up to four?

Mallard ducks on tree trunk picture frames salt and pepper shakers

Mallard Ducks

Pheasants on tree trunk picture frames salt and pepper shakers

Pheasants

Squirrels on tree trunk picture frames salt and pepper shakers

Squirrels