Tree Swallow Battle

Tree Swallows are interesting to watch and very, very fast birds. They move quickly, back and forth, up and down, swooping, swerving, and diving. To catch them in a picture is sometimes quite the  On one of our outings, we happened to catch 2 tree swallows flying around and then it began.....for a few seconds.....a battle over something. One of the birds was very upset at the other one :)  I find wildlife behaviour very interesting. 

Taken with Canon 7D Mark ll & Canon 100-400mm f4-5.6 USM ll @400mm - 1/2500 secs / f5.6 / ISO 320 - 400.