G. Warrink:
Fly agaric
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The waterbody on the left is filled with Sphagnum
G. Warrink:
View
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Autumn colors
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Sun reflecting from the grass
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A prairie?
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Tree
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Path along a tree
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Lonely tree
G. Warrink:
Measuring ammonia concentrations
G. Warrink:
Sun behind a cloud
G. Warrink:
Sunrays