S&S Controller Puzzle

[malachy cleary]

I have an S&S Controller mounted
Right next to a barn. I lowered it to
Inspect the pivot mechanism and discovered
A large quantity of guano inside the body
of the trap around the fulcrum block. I hadn't
Lowered the house since last summer and
And had simply left the trap door open over
The winter. The guano looked old- but
For the life of me I can't figure out how anything
Larger than a bee could have squeezed in there.
Bats?? It appears that whatever got in there
Was coming and going freely. I expected to find
The desiccated body of some starling that
Had wedged itself inside. Nothing but
Guano, some of which looked like it contained grass
Any thoughts?

[PM Pataskala]

Have you seen this post ?

http://www.purplemartin.org/forum/viewt ... ght=troyer