Input (grade 8): The Black-breasted Puffleg (Eriocnemis nigrivestis) is an average sized (8.5 cm in length) species of hummingbird endemic to Ecuador.
Output (grade 9): The Black-breasted Puffleg (Eriocnemis nigrivestis) is a species of hummingbird endemic to Ecuador. The average length of the black-breasted Puffleg is 8.5 cm.