I currently take photos with a Canon 50D. The lenses and related equipment used in the photos are the following:

-Sigma 50-500 mm
-Canon 100-400 mm (Currently being used for bird photograpy)
-Canon 400 mm f5.6
-Canon 180 mm macro
-Canon 100 mm macro
-Canon MP-65 mm macro
-Canon 10-22 mm
-Canon Extension Tube
-Canon 1.4 Multiplier
-Gitzo Tripod Leveling Base
-Mongoose Tripod Head
-Really Right Stuff BH-55 Tripod Head
-Really Right Stuff Flash Bracket for off-camera flash
-Wimberley Tripod Head
-Manfrotto 685B Neo Tec Monopod with a 3232 Head, 17.6 lbs max weight.

I use both Canon macro flashes and a Canon 580X Flash. This last Canon Flash is used sometimes with a Lumiquest Diffuser.

For some photos I used a heavy duty tripod: Gitzo G1325 Mk II, which can hold a maximum of 26.5 lbs.

For bird photography a Better Beamer and a monopod are used regularly. The monopod is special, since it can be raised or lowered with only one hand. As you can see in the photos it has a foot-rest which you step on and then a hand-lever you press to raise or lower the tripod. All this can be done while working the camera controls with the other hand. On a regular tripod you waste valuable time adjusting its height and by the time you are finished the bird you were trying to photograph is gone.

Useful Links:

http://www.kingsnake.com/westindian/

http://alfredo.colon.oiseaux.net

http://www.oiseaux-birds.com/home-page.html

http://www.flickr.com/groups/northamericannaturephotography

http://www.birdsasart.com/

http://www.ircf.org/

http://www.fotografia101.com/

http://nd-magazine.com/

http://mikemorelphotography.zenfolio.com/

If you place the cursor over the top right portion of any fully-sized photo it will display an "i", orange icon, which reveals the photo information and shooting condition details of the particular photo. These two photos of the equipment were taken with a Pentax camera.
Photo EquipmentPhoto EquipmentCMonopod Foot RestMonopod HeadCanon 580X Flash with Better BeamerThe Complete AssemblyCamera, Lens (100-400) , and Flash AssemblyMacro Setup