One of the hardest birds to photograph in flight would have to be one of the most common birds out here too; The Australian Crow.
When photographing a bird I usually look for 3 key features. Beak, Eye, and Claws. Second of which is feathers and sharp overall composition. Which makes photographing something as common as a crow a nightmare and an overall; a headache.
The goal for the next week is to continue trying to photograph a crow in flight. As I can respect any photographer who has undertaken such a challenge and achieved a passable result.
Below; the latest attempt.