When you spend whole day (12hours) in a hide you get bored when there are no birds to photograph and you get so many ideas and have time to try many things...but if you think that this was easy photo to make you are wrong...to get then in that position at same time and to even both of them looking at each other, it took me few hours to get the ''prefect'' shot that i imagined in my mind...
600mm · f/6.3 · 1/4000s · ISO 640
There is strange halo around the top one and some black blurry spots (at least on my monitor).
Oh man...you got a great eye haha. Even i didn't se that. For halo around bird im not sure what it is...maybe something brighter in the background, black spots i think are because i brihten up just the background and i didnt do well as it looks. But i didnt see that before you told that to me :-(