In Ecuador, the competition is at its most intense.
Here, there are 100 species of hummingbirds alone... all fighting for nectar.
Each flower only has a small amount at any one time, and so it's first come, first served.
One hummingbird has gone to great lengths to avoid conflict with other species.
Swordbills are the only bird with a beak longer than their body.
And some flowers are too elongated for the other 99 species of hummingbirds here to feed from them.
A swordbill's extraordinary beak, however, enables it to reach the places that others can't...
the top of this flower, where the sweet nectar is produced.
It has found a solution that means it doesn't have to join the fight.
And, as each long flower blooms, it gives the swordbill a fresh supply of food all to itself.