which biome most commonly contains birds that have specially designed beaks to filter food from water

Aquatic Biome

Explanation:

Aquatic Biome is the type of Biome that supports birds that have specially designed beaks to filter food from the water. This biome is characterized by having a habitat that has large alkaline or saline lakes or estuarine lagoons that typically have no vegetation.

This is evident in the Flamingos, which is a bird that has specially designed beaks to filter food from water, and it lives AQUATIC BIOME such as Mangrove swamps and sandy islands.