yes, a barn owl is bigger then a spotted owl

No. A spotted owl is larger than a Barn Owl. They use several different ways to compare size and over-all the spotted owl comes out larger in most categories. Barn Owls may appear to be larger because they have longer legs but the barn owl ranks as the 6th largest owl and the Spotted Owl is ranked 5th.

Spotted Owl :Length is 16.5-19 inches (41-48 cm). Wingspan is approximately 45 inches(114 cm). The northern spotted owl is the largest of the three spotted owl subspecies.

Weight

17-34 ounces (490-950 gr).

Barn Owl: length is approx 16 inches (35cm). Wingspan is approximately 42 inches (107cm)

Weight

Females weigh approx 670gm Males 560gm