I used to prefer shooting landscapes, but since obtaining the Canon 20D with the 400mm f5.6 lens, my interest in birding has morphed into a passion for bird photography, dragonfly photography, and any other wildlife I run across.
Canon 16-35 f4
Canon 70-200 f2.8
Canon 1.4x and 2x extenders
1) Dragonflies and Damselflies of the West by Dennis Paulson (published 2009): Inside cover and page 23 (http://press.princeton.edu/titles/8871.html)
2) Eastside Audubon - Numerous photos of both birds and dragonflies. (http://www.eastsideaudubon.org/). Some photos are on the web site, but most are at the Marymoor Audubon Bird Loop brochure and kiosk at the trail head.