underwater
aquatic
background
biology
black
black and white
bug
diagram
dorsal
dragonfly
drawing
ecology
education
educational
entomology
exoskeleton
graphic
hexapoda
illustration
immature
insect
invertebrate
isolated
juvenile
legs
lifecycle
nature
nymph
object
odonata
outline
predator
predatory
science
scientific
sketch
swim
water
white
wings