Which of the following is a native parrot found in Grand Cayman?

The correct choice highlights a native parrot species specifically associated with Grand Cayman. The term "Caymanensis" refers to the scientific classification of a native parrot known as the Grand Cayman parrot. This species has adapted to the local environment and plays a significant part in the biodiversity of the region.

Understanding the local wildlife and their specific classifications is essential when studying the ecology and natural history of the Cayman Islands. The other options represent wider classifications or broader categories of birds. For instance, "Psittacidae" is the family that includes all parrots but does not point to a specific species. "Amazona" is a genus that contains several parrot species worldwide but does not specifically identify the Grand Cayman parrot. "Hesterna," on the other hand, does not correspond to any known parrot classification or species in this context.

Thus, Caymanensis is recognized for its unique association with Grand Cayman, reflecting the island’s rich ecological heritage.