Nymphs of woolly beech aphid, Phyllaphis fagi, feeding on the underside of a leaf.

Nymphs of woolly beech aphid feeding on the underside of a leaf.; United Kingdom Credit: InfluentialPoints.com<br />Licensed under a <a href="https://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution 3.0 Unported License</a>
Credit: InfluentialPoints.com
Licensed under a Creative Commons Attribution 3.0 Unported License