"Alien Sighting ?"
Look at this very closely. It looks like something with multiple heads. What is it ? Atlas Moth.
Atlas moths are the largest species of moth in the world. The females have bigger, heavier bodies than males and larger wingspans too, ranging from 10 to 12 inches, with a surface area of at least 62 sq in. Despite their huge size, the moths do not eat anything once they hatch from their cocoons. Both males and females lack fully-formed mouth parts; they rely on the sustenance they build up as caterpillars, for stored energy. They only live as hatched moths for two to three weeks.
This was shot in the Butterfly Tent at the Chicago Botanical Gardens.