A Mayfly - Baetis bicaudatus
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B. bicaudatus larvae are differentiated from other Baetis by the presence of 2 unbanded caudal filaments and broad thumb-shaped labial palps. Montana's only Baetis with 2 tails.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
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