Hummingbirds at the feeder on my balcony.
This wasn't easy--these little guys are FAST! Imagine me, sitting by the open window with my camera in hand for long periods of time, arms cramping, eyes crossing, and swearing 'cause I'm catching nothing but little blurs... lol! These little guys aren't so shy either. I've actually had them come drink out of the feeder while it was still in my hand! :-)