Question

are these complete sentences, or is one of them a fragment?
the zookeeper warned noah lyles that many of the animals get aggressive when hungry. especially the pink flamingos, who peck at their caretakers.
complete sentences fragment

Explanation:

A complete sentence needs a subject and a predicate (a main verb or verb phrase that expresses an action or state). The first sentence "The zookeeper warned Noah Lyles that many of the animals get aggressive when hungry" has a subject ("The zookeeper") and a predicate ("warned..."). The second part "Especially the pink flamingos, who peck at their caretakers" is a fragment. "Especially the pink flamingos" is a phrase that modifies something but doesn't have a main verb to make a complete thought on its own (the "who peck..." is a relative clause modifying "flamingos" but doesn't function as the main predicate of the overall sentence - the main part lacks a verb to show what the flamingos do or are in a complete sentence structure). So one of them is a fragment.

Answer:

Fragment