Jon Cook notes:
I've cleaned trout stuffed with ants and a few other terrestrials
that I've suspected were taken under the surface, though I
can't prove it. I think drowned terrestrials are more common
than we know.

I know a few old-timers that fish with NOTHING except lacquered,wet,black ants
in sizes from 14-18, all summer long.
They sight fish and work the banks in smaller streams, and can make a seemingly
barren summer stream come alive.
Tom
p.s. Best PA trout for me, ever, was to a drowned cricket(standard dry tie,
with a very small shot about 16 inches up the leader).