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voanews.com/a/1441635.html

voanews.com/a/2436809.html

voanews.com/a/2793497.html

nps.gov/articles/bison-bellows-12-3-15.htm

d'après KALOCSAY Kálmán

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by Ernst Theophil Jucker

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nps.gov/prsf/learn/nature/red-throated-loon.htm

nps.gov/mora/learn/nature/mount-rainier-glaciers.h

by Ludwig Strauss

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huh

self-harm

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nps.gov/glca/learn/nature/amphibians.htm

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Psalmus

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domugraudi

by Lev Artsimovich

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