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Reference.org
Checkered garter snake
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<p>The checkered garter snake (<i>Thamnophis marcianus</i>) is a <a href="/facts/Species/oDg6b96r">species</a> of <a href="/facts/Garter_snake/g7BvKgsY">garter snake</a> in the <a href="/facts/Subfamily/2QPtfDS4">subfamily</a> <a href="/facts/Natricinae/HpKgaCt5">Natricinae</a> of the <a href="/facts/Family_(biology)/qTrn6E8E">family</a> <a href="/facts/Colubridae/WB4RqbEF">Colubridae</a>. The species is <a href="/facts/Endemism/xt4IpIsl">endemic</a> to the southwestern <a href="/facts/United_States/P0sCdLe5">United States</a>, <a href="/facts/Mexico/IT5bwhdh">Mexico</a>, and <a href="/facts/Central_America/CXKgTuxC">Central America</a>. </p>