https://youtu.be/ITSkzRgDB-M
Although horntails look like wasps with their projection on the back of their abdomen they neither bite nor sting. They usually hitch a ride into people’s homes in structural lumber, wood products or inside of firewood that is stored in the home. Female horntails deposit their eggs into the trunks of coniferous and hardwood trees. When the eggs hatch, the larvae burrow into the wood making tunnels in the wood. When the larvae are full grown, within a year, they make a silken cocoon near the surface of the wood and change into an adult. If the wood has been dried and made into lumber, it can take as long as 5 years for the horntail to emerge making a round hole in the surface of the wood to exit. If you have seen evidence of horntails, firewood should not be stored inside your home, rather brought in when it will be used.
gogreenpestcontrol.ca Ladner Tsawwassen Delta B.C. Randy Bilesky
https://www.linkedin.com/pulse/horntails-randy-bilesky?published=t
http://www.delta-optimist.com/opinion/blogs/blog-horntails-1.21352767