What
happened to the leaf? Monarchs do a curious thing. They chew a notch
in the stalk of a leaf before they eat it. This behavior is called
"leaf-notching."
Why
would a monarch cut the very leaf it is standing upon, until it
dangles like a loose tooth? Because milkweed contains a sticky,
white juice called latex. Leaf-notching cuts off the supply of latex
to the leaves. This makes milkweed safe for the monarch to eat.
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