Here is our Mighty Eagle Total Destruction video walkthrough for Angry Birds Seasons Winter Wonderham level 1-20. This level was first available on Thursday, December 20th, 2012. Use a couple Pink birds to destroy the tower on the left side, then loft the Sardine Can high in the air, landing it in the rubble dead-center in the level. This should be a good angle for the Mighty Eagle to swoop away most blocks.
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First two birds exactly like the video, but used the latter two for cleanup and then used ME. Obtained feather.
High arc the Sardine Can into the gap between the two ice structures.