The slowest bird on the Earth is the American woodcock (Scolopax minor). For this species was recorded 8 kph (5 Mph) flight speed.

The largest eagle known to have existed was the Haast’s eagle (Harpagornis moorei). It was 10 – 15 kg (22 – 33 lb) in weight, 130 – 140 cm (4.26 – 4.59 ft) in length, over 90 cm (2.95 ft) in height and about 3 m (9.84 ft) of wingspan.