There are 57 species of suckers in Mexico, although due to a significant lack of studies the number of species could reach up to 67. The tiny birds have been shrouded in mysticism since pre-Hispanic times; Its iridescent plumage and flapping of its wings up to 80 times per second were a symbol of good luck or a good omen.

At least 14 of the 57 known species are endemic; That is, they can only live in specific places. It is also the only down jacket that can fly backwards or suspend still in the same place in the air.