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Common Canadian forest insect pests, cont'd

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Common Canadian forest insect pests, continued. Click to enlarge.

The photo shows the evolution of three insects: the Spruce Larch Sawfly, the Hemlock Looper and the Black-headed Budworm from egg to adult insect. The images further show forest infestation.

Copyright photograph: E. Hennessey (Library and Archives of Canada)
Source: Statistics Canada, Canada Year Book 1947