Pitch-tube-up-close.jpg
NPS Photo/Courtney Buckley
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Pitch tube up close, Bark (botany)
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en
Pitch tube up close, Pitch Tube created by southern Pine Beetle
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ja
ピッチチューブを閉じ、バーク(植物)
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ja
松の洞に密着した松の洞
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pitch pine low-pitched low pitch high pitch thrombin