A specialized niche refers to:

A specialized niche is characterized by a narrow range of food requirements and specific habitat preferences. Organisms that occupy specialized niches are often highly adapted to particular environmental conditions and dietary sources. This means they exploit a specific subset of resources, often allowing them to thrive in specific ecological environments while potentially facing increased competition from other species that occupy similar niches.

For example, certain birds might have evolved to feed on a specific type of insect found only in a certain habitat, making them specialists that depend on the health and availability of that resource. In contrast, generalists would have a broader range of food requirements and could thrive in various environments, which would not accurately describe a specialized niche.