Mass. Gen. Laws ch. 131, § 19C
(a) As used in this section, the following words shall have the following meanings unless the context clearly requires otherwise:
''Covered animal'', any of the following animals or hybrids thereof: (i) elephantidae; (ii) lions (panthera leo), tigers (panthera tigris), leopards (panthera pardus), clouded leopards (neofelis nebulosa and neofelis diardi), snow leopards (panthera uncia), jaguars (panthera onca), cheetahs (acinonyx jubatus), mountain lions (puma concolor); (iii) non-human primates; (iv) ursidae; and (v) giraffidae.
''Mobile or traveling housing facility'', any vehicle used to transport or house covered animals while traveling for a performance, including, but not limited to, trucks, trailers or railway cars.
''Performance'', any presentation, exposition, fair, animal act, circus, ride, trade show, petting zoo, carnival, parade, race or similar undertaking in which a covered animal is required to perform tricks, give rides or participate as an accompaniment or be available for the entertainment, amusement or benefit of a live audience.
''Resident animal'', an animal owned, leased or loaned and otherwise exclusively housed at a non-mobile, permanent institution or other fixed facility.
''Traveling animal act'', any performance where a covered animal is transported to, from or between locations for the purpose of the performance in a mobile or traveling housing facility.