Of the 60,000 bees in a hive, almost 99% of them are female! Female honey bees, or worker bees, make all of the decisions in the hive and do all of the work. There are a couple hundred male bees in a hive, but they don't do much but sit around and eat food.
Well, there is the fact that "bird" is itself slang for both penis and woman, though of course in the case of the latter it is antiquated enough to be considered offensive (of course, since as I'm informed the only inoffensive ways to refer to those who identify as belonging to the gender traditionally known as the "not male" gender are "girls" for those under 18 and "women" for those above, the offensiveness of this term is perhaps expected.)