Terns

The experimental salt-water algae farm was having difficulty because of
the depletion of the plants by hundreds of sea gulls. An ornithologist
was hired to solve the problem. His solution was to grow cannabis sativa
plants along the rim of the algae tanks. The terns would nibble at the
cannabis and leave the algae alone. Cost was the only factor. He was
sent to the Chief Financial Officer to get approval. "Certainly, spend
all that is necessary" he was told, ... "Leave no tern unstoned."

The motto of our local health club: ... "We will leave no stern untoned!"

And then there was the naval commander that ordered that all band
practices take place aft. He wanted to be certain that ... he left no
stern untuned.