I thought they were girls but it turns out they are boys! Now they need new names. I will consider all suggestions.
Their wee personalities: Mabel likes to ring the shiny bell much of the day, and sometimes aggressively grooms Mildred who does not appreciate it. Mildred likes to eat and sit quietly. They each sleep on her(his) own trapeze.
On behalf of my gender-confused parakeets, I thank you.