Does the side of the thorax have yellow to blue zig-zag stripes, and does the abdomen have blue spots?	Does the side of the thorax have straight yellow or blue stripes, and the abdomen has alternating large blue spots and small green spots?
Zigzag Darner Aeshna sitchensis	California Darner Aeshna californica

Written by Mark Lung and Stefan Sommer, 2000
Photos by Dennis Paulson, 2001.