Wood

Wood is a type of block that has medium strength. It is brown in color and best broken by Yellow Bird, Boomerang Bird, Red Bird and Big Brother Bird (unless it is a square block). Blue Birds (even when split) can only shatter about one block of wood making them no stronger than red birds when breaking wood. Red wood is as easy to destroy as regular wood.

Red Wood
This type of wood only appears in Year of the Dragon alongside its normal counterpart. It has about the same strength as normal wood, however, being slightly weaker, as it is easily destroyed by Red Birds.

Trivia

 * It is odd how Black Birds can break through several pieces of stone but not wood.