A Scots pine has fallen during a winter or spring storm and has subsequently been browsed upon by small roedeer which eat the phloem (it tastes sweet to me too for a second before the astringent tannins take effect). Tiny resinous balls later build up at the damaged sites and the volatile monoterpenes float away to attract pine shoot beetles, Tomicus piniperda, which prefer these trees because they are less able to produce more resin than is a healthy tree. Resin is slightly toxic and can solidify and entrap bark beetles.

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Images © 1996 by John A. Byers, Chemical Ecology.