Gee Dad, will I really get big like you?
Wildlife photography is all about "capturing the moment", a fleeting moment when light, subject, and expression come together in a special way.
A herd of deer feeding in a meadow is certainly picture worthy and a good portrait of an individual animal is nothing to sneeze at but the very best shots happen when something a little out of the ordinary occurs.
Capturing the interaction between animals requires close observation and constant readiness. Relaxing for even a moment can result in the photographer seeing the "perfect shot" and watching it pass while trying to make the required camera settings.