Assertion: hummingbird's number | /r/AtLocation | the united states
Facets:
Source sentences:
text: A small number of hummingbird species live in the United States for all or part of each year.
text: The greatest species richness is in humid tropical and subtropical forests of the northern Andes and adjacent foothills, but the number of species found in the Atlantic Forest, Central America or southern Mexico also far exceeds the number found in southern South America, the Caribbean islands, the United States, and Canada.