Narwhal population since provide websites found. if not, why can't i find any information on narwhal populations?

Narwhal population is increasing exponentially since 1970, due to some factors like increasing Birth rate, immigration etc.

If you are looking for website, then you should find for wider topic like search for Narwhal only instead of it's population/growth

Hope this helps!

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.