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A harvesting machine removing selected trees in a thinning operation designed to enhance the growth of the trees that remain after the operation. The “processing head” is holding a horizontal tree stem that is being delimbed and processed into logs…

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from article Forest engineering

A well-engineered forest road and timber bridge in the Tongass National Forest in southeast Alaska. The bridge, designed to support heavy logging trucks, was used rather than a culvert to reduce erosion and protect water quality. (Photograph…

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from article Pomegranate

Pomegranate (Punica granatum). (Photo courtesy of the Agricultural Research Service Germplasm Repository)

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from article Life forms of plants

Life forms of plants according to C. Raunkiaer. (After P. Dansereau, Biogeography: An Ecological Perspective, Ronald Press, 1957)

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from article Life forms of plants

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from article Echolocation

Echolocation is a physiological tool used by gray bats (Myotis grisescens). (Credit: Amareta Kelly)

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from article Echolocation

Sound spectrograms representing sonar signals of (a) Brazilian or Mexican free-tailed bats (Tadarida brasiliensis), (b) big brown bats (Eptesicus fuscus), (c) Wagner's mustached bats (Pteronotus personatus), and (d) greater horseshoe bats…

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from article Chevrotain