Maternity colony (bats) Maternity colony (bats) A maternity colony refers to a temporary association of reproductive female bats for giving birth to, nursing, and weaning their pups. The colonies are initiated by pregnant bats. After giving birth, the colony consists of the lactating females and their offspring. After weaning, juveniles will leave the maternity colony, and the colony itself will break apart. The size of a maternity colony is highly variable by species, with some species forming colonies consisting of ten or fewer individuals, while the largest maternity colony in the world in Bracken Cave is estimated to have over 15 million bats.
BATS Global Markets daily basis. BZX and BYX are different chiefly because of their pricing structure and the BZX is almost four times bigger than the BYX. At that time, Bats was the third largest stock exchange operator in the United States. In November 2008, Bats converted its ECN to a national securities exchange, BZX, which allowed Bats to participate in and earn market data fees from the United States consolidated tape plans, reduce its clearing costs, and operate a primary listings business. In February 2010, Bats expanded into a new asset class by offering trading of listed equity options on BZX. In