Original sentence: Macaws less than about 50 cm long, including the Primolius genus,  are sometimes called "Mini-Macaws".They are less than 50 cm long, much smaller than the macaws of the Ara genus
Edited sentence: Macaws less than about 50 cm long, including the Primolius genus,  are sometimes called "Mini-Macaws".They are less than 50 cm long, much smaller than the macaws of the Ara genus