white-backed woodpecker

and bark barkeating beetle birchbark bird birds borer borers caucasian caucasus cavity dendrocopos endemics extracts forest forestry fowl garden hewers hollowing insect jerk larva larvae leucotis leucotos management medics nature nesters off pecker peckerwood pests picidae pinhole pound rare sick silver silviculture spotted the timberworm tree trunk useful watching whitebacked wild wood woodborer wooddestroying woodpecker