Break the Rules
Advice I'd normally give to any aspiring wildlife photographer - 'Don't not point your camera up at birds in the trees'.
Why? Because you'll end up with a fairly unattractive angle of your subject and most likely against a blown-out white or dull grey background - and that's if you have balanced your exposure favourably.
Instead you should try to get on their level; allowing for a more exciting background and to give your audience a more complete picture in regards to environment, season, time of day, etc.
BUT Sometimes it pays off to break the rules...
In this case, I captured a striking image of a Barn Swallow taking flight that I shot from almost directly below! The sky is over-exposed, but it illuminates the delicate wings of the bird from behind beautifully and gives us a wonderful new perspective on this otherwise quite common bird.
It's good to be aware of general 'rules of photography' but it is important to play with the rules, understand why they exist and also when they might be broken to capture something truly unique.
So go ahead, break the rules! It'll make you a better photographer.
How Did You Shoot That?
Shoot Mode: Manual
Shutter Speed: 1/2500
Focal Length: 403mm