» Family Baetidae (Blue-Winged Olives)
11 genera aren't included.
This is page 4 of specimens of Baetidae. Visit the main Baetidae page for:
- The behavior and habitat of Baetidae.
- 10 underwater pictures of Baetidae.
Pictures of 103 Mayfly Specimens in the Family Baetidae:
Baetidae (Blue-Winged Olives) Mayfly Nymph
View 5 PicturesThis nymph has only two real tails. The third is present, but too short to see in these pictures. It has particularly small gills and indistinct gill veinlets (Veinlet: Short insect wing veins connecting the major longitudinal veins to the wing margin.). Baetidae (Blue-Winged Olives) Mayfly Nymph
View 4 PicturesThis Baetis nymph is quite a bit larger than any of the others I found in winter 2004. Abdomen segment 5 is only slightly pale while 9 and 10 are quite pale. The tail is banded at the tip. Its body measures about 9mm long. It's much larger than the other Baetis specimens I collected, and it has quite well-developed wingpads.
It's most likely a mature nymph from a very early-hatching brood. It comes from the headwaters of a very small, very spring-fed Lake Superior tributary, which wasn't at all frozen despite very frigid temperatures and 3 feet of snow on the ground.