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does the crested shrike tit occupy the same niche as the varied sitella?
crested shike tit- eats insects(esp grubs)-tears off bark trunks, and takes insects from under bark
varied sitella- eats insects- from crevices in trunk; moves down the trunk

What is the niche (role) of the Redhaired Pine bark beetle within its ecosystem?

a tree dies if its bark is stripped right around the trunk at any parthttp://www.dailymail.co.uk/news/article-…