Mt. St. Helens/cc-mamal-habitat-sampling_tif.jpg

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A research crew checks a small mammal trap. Open, barren areas such as this one offered little habitat to small mammals and were slow to be colonized (photo by Charlie Crisafulli).

A research crew checks a small mammal trap. Open, barren areas such as this one offered little habitat to small mammals and were slow to be colonized (photo by Charlie Crisafulli).