G's Biosurvey Cheat Sheet
Mayfly Nymph
Net-spinning Caddisfly Larvae
Black
head;
green
body;
curls
when you
touch it
Mayflies M A Y- 3
letters, 3
tails
www.troutnut.com
www.troutnut.com
Stonefly Nymph
Non-Net spinning Caddisfly Larvae
Mottled
head;
bright
green;
curls
when you
touch it
2 tails; flat
stone-like
plates
© gallery.nanfa.org
© www.coursehero.com
Riffle Beetle
Non-Net spinning Caddisfly Larvae
Black dots crawling
for edge of
the net
© bugguide.net
Golden &
Caddisshaped
www.troutnut.com
6/8/2015
Cranefly Larvae
Scuds
Fat; wormlike with
ribs around
Shrimplooking
© www.ecospark.ca
www.troutnut.com
Blackfly Larvae
Midges
Beaded
head; on
the plastic
after you
pick up
the net;
1/4" to
1/2" long
Fat butt attached to
the sides of
collecting
trays
© www.studyblue.com
www.troutnut.com
Hellgrammites
Sowbugs
Pincer
mouth
parts, 6
legs,
filaments
on both
sides of
segments
of
abdomen
www.troutnut.com
www.ecospark.ca
Slow
moving;
ovalshaped;
whitishgray; 7
pairs of
legs look
like go all
around
body
6/8/2015