Small Minnow Mayflies
These photos supplement pages 49-62 of the Guide to Aquatic Invertebrates of the Upper Midwest. Information on the biology of Baetidae can be found on page 56. Baetidae look similar to Siphlonuridae, although Baetidae have a notched labrum and antennae at least 2x the width of the head. Click to compare with Siphlonuridae.