Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Monarch Butterfly Biosphere Reserve' has mentioned 'Canada' in the following places:
Occurrence Sentence Text Source
[3] The survival of the species depends on a large number of habitats from Canada, the United States and Mexico during its annual migration cycle.
High unemployment, especially for youth, also provokes migration into other parts of Mexico and to the United States or Canada.
The purpose of this is to determine the butterflies exact migration route as they fly back north to the U.S. and Canada in the spring.
[16] Butterfly counts coming in from the United States and Canada in recent years were relatively stable in the 2000s, with a dozen confirmed colonies as of the 2007-2008 winter.
[15] These reserves are visited by thousands of Mexican and international tourists, principally from the United States, Canada, Spain, France, Germany and Japan.
Up to a billion monarch butterflies return annually, from breeding areas as far away as Canada, to land in close-packed clusters within 14 overwintering colonies in the oyamel fir forests of central Mexico.