A Crazy Little Hummingbird

I made a new batch of hummingbird food this week and ever since I filled the feeder this little hummingbird has come in the evening (he was also there this morning when I left for work).  He sits on the wrought iron crook for hours.  Sometimes he eats and often he will chase away another hummingbird who is trying to approach the feeder.  It is hilarious to watch...I have never seen a hummingbird sitting for so long in one place!