Wood

Wood is a type of block that has medium strength. It is brown in color and best broken by Chuck, Hal, Bomb and Terence  (unless it is a square block). The Blues  (except when split) can only shatter one block of wood making them weaker than Red when breaking wood.

Red Wood
This type of wood only appears in Year of the Dragon in Angry Birds Seasons alongside its normal counterpart. It has about the same strength as normal wood, however, being slightly weaker, as it is easily destroyed by Bomb and Chuck. Red Wood also returns in a few levels in Ham Dunk.

Trivia

 * It is odd how Bomb can break through several pieces of Stone but not wood.
 * In Angry Birds Star Wars, there is some iron inside the wood blocks.