On Halloween, 2014, Yippocrates Escondido "Yippee" Coyote turns 18!
I did a retrospective collage in 2010, so here's an updated photo retrospective over the years.

He's had a muzzle lift in 1999, is on his 5th pair of handpaws, survived a pie-toss, temporary semi-retirement, and is working on a full makeover (someday!?)

1996 Pasadena Doodah Parade, public debut
1997 ConFURence 8, Buena Park California
1998 Duckon - Furry Variety Show
1999 ConiFur, Fife Washington (Guest of Honor!)
2000 Mephit FurMeet, Memphis Tennessee
2001 ConiFur, Fife Washington
2002 San Jose Holiday parade

2003 Kyreeth photo shoot
2004 Mascot Birthday, Sacramento RiverCats
2005 MegaPlex, Orlando Florida
2006 FURther CONfusion - Furry Night Live
2007 How Berkeley Can You Be festival
2008 FURther CONfusion
2009 Eiffel Tower, Paris France (EF15 Guest of Honour!)

2010 EF 16 Fursuit Parade, Magdeburg Germany
2011 Ocean City Doodah Parade Pie-asco

Studio photo, April 2011 by Kaanah at TOS's place

2013 Furry Weekend Atlanta (Guest of Honor!)
2014 Las Vegas sign photo, Elliott's Spring Gathering

I only found one photo from 2012 due to his retirement, and it was a mirror selfie from a New Years party just before midnight.

Some remarks from Twitter:
Syber said, "he can go buy sharpies, spray paint, porn and cigarettes now!"
Bjorn, the Gneech & Stanley D. Lion said "he can go vote on Tuesday!"
Latte said "HAPPY BIRTHDAY HERE IS A JURY SUMMONS!!!"

PS. I was tempted to tag this adult...since he's over 18 now :)