Table 1:

Fish were sampled from seven rivers in the Upper Colorado River basin. Individuals sampled included parental species and hybrids, abbreviated in the table below. (B = blue-head, F = flannelmouth, W = white. Hybrids are represented with a × connecting parental species, i.e. flannelmouth×white = F×W).

Location	Drainage	Individuals	Species	Hybrids (> 3 ind)
Big Sandy River (WY)	Green River	61	B, F, W	-
Little Sandy Creek (WY)	Green River	80	B, F, W	F×W
Escalante Creek (CO)	Gunnison	85	B, F, W	B×F, B×W, F×W
White River (CO)	White	55	B, F	B×F
Little Snake River (WY)	Yampa	68	F, W	B×W, F×W
Yampa River (CO)	Yampa	72	B, F, W	B×W, F×W
Muddy Creek (WY)	Yampa	58	B, W	B×W, F×W