The May 2007 issue of Fly Fisherman has several new flies from Kelly Galloup, including his version of articulating the zoo cougar. This new fly is called the "Heifer Groomer," and basically contains two cougars tied on size 2-6 3XL hooks jointed with wire. The rear half also has a mallard flank, but no spun deer head, instead with several palmered maribou plumes. I'll get to work tying some and post pictures when I'm done. What an awesome fly.
He says in the article that "[the fly] produced almost all of our big fish from the Madison in 2005" and calls it a must-have fly.
Streamer flies continue to grow in popularity and in size!