The Niche Of The Nuthatch

Nuthatches share habitats and diets with woodpeckers but are unique in their ability to walk upside down. This behavior allows them to access food sources under tree bark that other birds might miss, giving them a distinct ecological niche and way of life.

What type of food source do nuthatches exploit that other birds might overlook?

Why is the nuthatch considered to have a unique way of life?