That must be a very delicate balance since it must expend more energy to fly if the bird is heavier.
But I remember hearing about the amazing migratory flights of some small birds that they conquer in under two days, which would imply they were flying 35mph nonstop with no breaks. So it must be working well for them.
They become pretty fat, so the energy storage outweighs the increased consumption. I can always tell when they are about to leave because they are significantly round.
That must be a very delicate balance since it must expend more energy to fly if the bird is heavier.
But I remember hearing about the amazing migratory flights of some small birds that they conquer in under two days, which would imply they were flying 35mph nonstop with no breaks. So it must be working well for them.
They become pretty fat, so the energy storage outweighs the increased consumption. I can always tell when they are about to leave because they are significantly round.