Pygalitsa or lapwing is a small bird of the plover family, a distinctive feature is a crest on the head of very narrow long feathers. The bird is small and nimble, which is why small fidget girls are called pigalits.
According to another version, in 1812 in Paris, Platov's Cossacks invented this word for girls of easy virtue from the Place Pigalle. At that time, France lost the war with Russia, everywhere there was hunger and devastation, even teenagers had to go to the panel for a crust of bread. Over time, the original meaning of this word was lost and ceased to carry a negative meaning; nowadays, lively girls of small stature are called pigalians.