You can hear before you see them.
Our provincial bird (Nova Scotia), the Osprey is a common and fascinating bird to watch and photograph.
As one approaches the nest, you can hear it calling, and if it's mate is on the nest, it will call loudly as it approaches. This makes for great cues to when to be ready to start shooting. Bird photography, and wildlife photography in general is an exciting and ever changing endeavour, and I am not just talking about the gear. My current Canon set up is amazing for capturing the action, a far cry from using manual focus and film back in the day.
Enjoy,
Gary
