Which amphibians are explicitly mentioned as part of the Pied-billed Grebe's intake?

Answer

Frogs and salamanders

The Pied-billed Grebe broadens its diet to include amphibians such as frogs and salamanders, in addition to fish and invertebrates.

Which amphibians are explicitly mentioned as part of the Pied-billed Grebe's intake?
foodbirdanimalGrebe