The goal is to track individual birds over several years.
On the other hand, individual birds sometimes will fly down directly over the boat from behind.
They were too far off to make out individual birds.
It is home to around 3,000 individual birds from 200 species.
Its population was estimated in 1989-90 to comprise 274 individual birds.
Flocks of over 400 individual birds may be seen in March.
They allow for easy visual identification of individual birds from a distance.
"Our commitment is to a species, not to individual birds."
Some feeding grounds in large bodies of water have included up to 1,900 individual birds.
The individual bird can sometimes recover, but this is rare.
