anyone have any methods / patterns that pick these guys up with any regularity?

I had an odd experience this weekend, where there were numerous moderate size cats appararently surface feeding in one of the heavily weeded waterways here in the houston vicinity.

I threw some of about everything at them (leaches, couple nymphs, couple wets, some foam bugs) and didn't get so much as a look.

there was a light hatch coming up most of the morning...perhaps i should carry some parachute adams with me from now on...'just in case'...didn't have the trout box with me, so couldn't 'match the hatch' too well.

any thoughts?