Another biological threat to the Canyon is the insect known as hemlock woolly adelgid. This is due to loss of boreal forests from hemlock woolly adelgid, logging, and pollution. Warmer temperatures are likely to enable the woolly adelgid to expand northward. Tree roots absorb and transport the product into the foliage and kill hemlock woolly adelgid. The Balsam woolly adelgid also has a significant impact on Pacific Northwest forests. The hemlock woolly adelgid has destroyed most of the hemlocks within the park. For example, the hemlock woolly adelgid has infested hemlock trees in southern Vermont. For example, the hemlock woolly adelgid has infested hemlock trees in southern New Hampshire. These hemlocks have suffered from infestation by the hemlock woolly adelgid. Like Canada hemlock, this tree suffers severely from the hemlock woolly adelgid. These too are under attack by an introduced pest, the hemlock woolly adelgid. The beetle's lifecycle is in parallel to the lifecycle of the hemlock woolly adelgid. "Abies fraseri" is severely damaged by a non-native insect, the balsam woolly adelgid ("Adelges piceae").