Greg, not sure what all elements you have in your pond but you'd be surprised at where they will string out a ribbon..
I pulled a Z-trap today and not only was it covered in ribbons, many were inside the trap.
When I pulled my B-trap yesterday it contained a couple dozen bullfrog tadpoles, a male YP ~8", a female YP ~10",
and an egg ribbon that looked impossibly huge to have come out of the female that was in the trap.
