Formica ulkei Emery, 1893
Length: ~8 mm
Range: Throughout Alberta
Edges of swamps, marshes, fens, sedge meadows and wet prairie
Time of year seen: Summer
Nests are constructed deep underground with the excavated material
forming a conspicuous mound above the nest. A number of entrance
holes are located around the mound near the base or slightly up the
sides. Mounds may be covered with a thin layer of plant debris.
Mound size ranges up to 122 cm in diameter by 45 cm in height.
(Wheeler et al, 1944).