Canaries.

Canaries have been extensively used in research to study neurogenesis, or the birth of new neurons in the adult brain, and also for basic research in order to understand how songbirds encode and produce song. Thus, canaries have served as model species for discovering how the vertebrate brain learns, consolidates memories, and recalls coordinated motor movements.

This is a good analogy for Neural networks where backpropagation represents learning, final weights represent consolidated memories, and model inference represents recalling motor movements. We are proud to be an AI-first company.