Pitch moth

http://www.pfc.cfs.nrcan.gc.ca/diseases/hforest/Pests/spmoth_e.html

http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7479.html

http://web.unbc.ca/%7Elindgren/RESEARCH/pitch.html

http://www.forestryimages.org/browse/subthumb.cfm?sub=425&start=1

http://www.fs.fed.us/r1-r4/spf/fhp/field_guide/44sqaptchmth.htm


Spruce Budworm

http://www.pfc.forestry.ca/entomology/defoliators/budworms/west_spruce_e.htmlhttp://pep.wsu.edu/hortsense/scripts/query/displayProblem.asp?problemID=641&tableName=plant
 
http://www.na.fs.fed.us/spfo/pubs/fidls/westbw/fidl-wbw.htm

http://www.britannica.com/ebi/article-9313675