User blog comment:Hulk10/Theories on how Gronckles can fly like hummingbirds/@comment-24990845-20150511093302/@comment-26219548-20150514131531

Most hummingbirds can flap their wings faster than other birds with similar wingspan. One reason is because their calorie intake is very high. This may be true to the gronckle. Gronckles eat a lot and are rather lazy. This helps them get more calories and conserve them too. Also, gronckles have low stamina and sppeed when they fly, so it is probably because flapping itxs wings quickly uses too much energy and it tires out easily. So I feel that it is due to its calorie intake, not its wingspan