Some more pictures in APERTURE mode Birds including examples of small birds far away, large birds close by and pictures of unexpected action:

(@dik maintenance) Photo at top: Lesbos Bee-eater (Bijeneter) size 16cm distance 25m equivalent 900mm D300 Nikkor 300mm f/4D total camouflage 1//1000 second f/8 ISO 400. […]

This “quick start” may give you all the practical benefits when using either APERTURE Mode Birds Reach or APERTURE Mode Birds Action but when using […]