Originally posted by Roger007The trick for the last line being that "lies" and "isle" are anagrams.
You are all very close. The answer is simply 'a mine'
My rationale being:
A perilous trap - a mine (landmine etc.)
that belongs to me alone - mine
Much fear here lies for the bird of dogs - an underground mine holds much fear for the canary, originally found on the canary islands - Islas Canarias, the Island of the Dogs.
Although technically ...[text shortened]... ng the canary would probably not be aware of it's potential fate and therefore not be afraid.