Fairly straight to irregular lines of raised ridges of grass with no openings

Scattered mounds of soil present within ridge system; 1 pint to 2 quarts in volume

Grass on ridges can turn brown and dry out quickly

Most apparent in early summer and again in September to October

No soil mounds present, but small, irregular shaped trails on lawn surface

Especially visible just after snow melt

Loose grase blades on tops of tail give the appearance of ridges, but soil is not raised

Grass plant usually not killed, but may be slower to come back in the spring

Occurs during early to mid-spring; can remain throughout the summer

Small, conical bumps randomly distributed through lawn

4 to 8 inches long and reddish-brown

Small, about 1/8 inch wide, hole generally surrounded by a conical mound of dirt

Found in areas where grass in thinning or bare

Found anytime during spring or summer

Ant 1/10 inch long and brown

Large mounds with numeroud 1/8 to 1/4 inch wide holes

Found in healthy lawns as well as thinning turf

Found anytime during spring or summer

Ants 1/8 to 1/4 inch long and black or black and red