Peripheral populations

Some species are considered rare in Minnesota because of where they exist in relation to their entire range. As species reach the far edges of their natural range, they may become less common, and may be considered rare if their populations are low in numbers or geographically limited.

The Laurentian tiger beetle is known only from Ontario, Manitoba, and Minnesota, and is apparently found only north of the Laurentian Divide in Minnesota.

Laurentian Tiger Beetle (Cicindela denikei)

Peripheral populations

Ten reasons why species become rare

Habitat loss and degradation Invasive species and competition Pollution Habitat specificity Persecution and exploitation

Peripheral populations Vunerable characteristics Relict populations Disease Global climate change

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