Birds in Tree Oil Painting by "Carlson"

Hello,

I found this painting at a thrift store. Paid 29$. It appears to be an oil painting, its on canvas. Its quite large - about 3x 4 feet. The signature says "Carlson". I have looked online but havent had much luck. I did find another painting online that had the same signature and similar style painting that was of a boat on the ocean (http://www.rubylane.com/item/489855-347/Carlson-signed-Oil-Canvas-Boat). I also found a listing on this website with the same painting (http://www.instappraisal.com/antique-appraisal/birds-perching-tree-branches) . Does anyone know more about the artist and/or painting? Thanks for your help. I really love this painting.

Kimmy