Black-legged tick may refer to either of two species of
tick
Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Ticks are external parasites, living by ...
s found in North America:
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Ixodes scapularis
''Ixodes scapularis'' is commonly known as the deer tick or black-legged tick (although some people reserve the latter term for ''Ixodes pacificus'', which is found on the west coast of the US), and in some parts of the US as the bear tick. It wa ...
'', also known as the "deer tick" or "bear tick," found in eastern North America
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Ixodes pacificus
''Ixodes pacificus'', the western black-legged tick, is a species of parasitic tick found on the western coast of North America. ''I. pacificus'' is a member of the ''Ixodidae'' (hard-bodied) family. It is the principal vector of Lyme disease in ...
'', the western black-legged tick, found on western coast of North America
{{Animal common name