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Djur (Subject) / Rodents (Lesson)

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• Rodent taxonomy? Families? Characteristic? • Muridae, family of rats and mices (chisel-formed teeth, mostly generalists, ears stick out!) • Cricetidae, family of lemmings, voles and muskrat (feed on grass and other vegetation)
• What are predators on voles (and such)? • Tengmalm’s owl (specialist) • Least weasel (specialist, leaves no voles) • Red fox (generalist)
• Different Voles? Way of feeding? • Field vole (specialist, dangerous for replanting after CC) • Grey-sided vole (specialist, lives under boulder, shelter is more important than food) • Bank or forest vole (generalist, not dominant)
• NO Reddish color on voles? • Field vole – brownish grey and bump on second molar (2-7 litters) • Root vole (Tundra vole) – larger and darker, NO bump in second molar (2-5 litters)
• Reddish color on voles? • Grey-sided vole (red fur on the back), north of 60°! – 2 to 3 litters • Bank or Forest vole (reddish and ears obvious, long tail) – 4 to 5 litters
• Field vole? Litters? 2 to 7 litters
• Root vole (Tundra vole)? Litters? 2 to 5 litters
• Grey-sided vole? Litters? 2 to 3 litters
• Bank or Forest vole? Litters? 4 to 5 litters

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