The Whitefaces are small dark dragonflies with a white face and small dark patch at the base of the hindwings. Juveniles and adults have different colors, which further complicates an already-difficult-to-identify group. Five species occur in Wisconsin and are best separated by (1) patterns of wing venation, and (2) shape of the abdominal top spots, especially in females and juveniles. The Hudsonian Whiteface has uniform and large oval top-spots on the abdomen in both sexes (red in males, yellow in females), with the last spot on segment 7 triangular. It also shows light veins in the dark basal patch on the hindwings. Crimson-ringed Whiteface has red on thorax but lacks top-spots on the abdomen. Juvenile Dot-tailed Whiteface (L. intacta) is similar but has non-uniform top-spots ending with a square on segment 7. Hudsonian Whiteface is uncommon at various marsh and bog ponds in the northern two-thirds of Wisconsin and its peak flight may be earlier than other whitefaces (early-mid June). I saw few individuals in 2008 and didn't photograph any very well...