For wildlife photography, the DJI Air 3 is the best tool because of its 70mm telephoto camera. Wildlife photography from a drone requires maintaining significant distance from animals -- the telephoto lets you photograph from 100-200 meters away and still fill the frame with your subject.
With the wide-angle only camera on the Mini 3 Pro, you would need to fly much closer to get usable wildlife shots, increasing disturbance risk. The Air 3's telephoto gives you 3x reach over the wide camera -- you can photograph from 3x the distance for equivalent subject size in frame.
For whales, NOAA guidelines recommend 100 yards (90 meters) minimum clearance. At that distance, the Air 3's telephoto produces usable images; the Mini 3 Pro's wide camera captures only tiny subjects. Beyond equipment, watch for behavioral change: if an animal reacts to the drone (changes behavior, vocalizes), you are too close regardless of the distance number.
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