(Monochamus species)
Average Size without antennae: 21mm
Responsible for extensive degrade in felled or weakened conifers due to 'grubholes' that may extend into the heartwood. A recent study found degrade losses of $20 per cubic meter when attacked pine was processed into boards.
(Xylotrechus species)
Average Size: 15mm
Larvae riddle the wood of dead or injured spruce, pine or douglas-fir, packing their galleries with a granular frass (sawdust).
(Tetropium species)
Average Size: 13mm
Economically important pest causing degrade in spruce logs. Other Tetropium species will attack other conifers as well.
(Arhopalus species)
Average Size: 24mm
Common wood borer of fire-killed douglas-fir, pine or true firs. Tunnels can extend deeply into the heartwood.
(Chalcophora angulicollis)
Average Size: 30mm
The largest of the western flatheaded borers. Like other flatheaded borers, infested timber shows almost no outward sign of attack.
(Buprestis aurulenta)
Average Size: 16mm
One of the most damaging flatheaded borers in western North America. Larvae can also survive up to 50 years in green timber, logs or poles.
(Dicerca tenebrosa)
Average Size: 19mm
Very common flatheaded borer found across North America.
(Siricidae)
Average Size without ovipositor: 25mm
Attacks dead and dying conifers, especially fire-kill or salvaged timber. The long "stinger' is actually an ovipositor, used to inject eggs into the sapwood of trees.
(Trypodendron lineatum)
Average Size: 3mm
A very common wood boring pest. 'Pinholes' and dark staining cause degrade, and losses can quickly climb into the millions of dollars at a single site.
(Gnathotrichus sulcatus)
Average Size: 4mm
Economically important pest in coastal regions of western North America. Adults fly in spring and again in late summer.
(Gnathotrichus retusus)
Average Size: 4mm
Common in coastal and interior regions of western North America. Adults found May through August.
(Dendroctonus ponderosae)
Average Size: 5mm
The most destructive of the western bark beetles. It is a major pest of lodgepole pine but will also attack Ponderosa and other pines.
(Dendroctonus rufipennis)
Average Size: 6mm
Serious pest of mature and over mature spruce. During epidemics, healthy trees can be killed over wide areas.
(Dendroctonus pseudotsugae)
Average Size: 6mm
Adult Douglas-fir beetles prefer to attack downed and dying materials but will kill healthy trees when populations build.
(Dryoctes confusus)
Average Size: 4mm
The most destructive pest of subalpine fir.
