COTA's wiki is in a bad need of updating and here's what i know. I am trying to contact COTA to get more information and verify what i know
ALL 1999 Novabus LFS and 2001 New FLyer D40LF buses are retired (this is obvious but not mentioned that all are retired in the wiki)
all 2003 New Flyer D40LF buses except 2308 and 2310 are retired. The current status of 2308 and 2310 is unknown but they may have been retired with the order of 2016 Gillig Advantage CNG buses.
2004 New Flyer D40LF Buses: 2403 and 2404 are retired The current status of 2401, 2402, and 2405 is unknown but they may have been retired with the order of 2016 Gillig Advantage CNG buses.
2005 Gillig Advantage buses: Some units may have been retired but i cant confirm which units if any have been retired
2005 New Flyer D40LF: The current status of all 5 (2521 - 2525 units is unknown but they may have been retired with the order of 2016 Gillig Advantage CNG buses.
2009 Gillig Advantage 30ft Buses: 2940 and 1 or 2 more buses have been converted for use on the new COTA Air Connect route.
COTA ordered buses on the following years but theres no record in the WIKI
2010 Gillig Advantage, 2011 Gillig Advantage, 2012 Gillig Advantage, 2014 Gillig Advantage CNG, 2015 Gillig Advantage CNG, 2016 Gillig Advantage CNG (13 units)
Ill add/update info when i can verify the info (COTA responds)