Throughout the Angry Birds series, the Pigs set up blocks, usually created for fortresses. The Pig King, King Pig, orders his pig army to create fortresses using these blocks to delay the Bird's goal to retake their stolen eggs.
Here is a table for how strong, easily destroyed by, and color of the basic blocks.
|Block||Strength||Color||Birds that can destroy it||Birds that cannot easily destroy it|
|Glass||Weak||Light blue||Red, The Blues, Bomb, Matilda, Hal, Terence, Bubbles, Stella (via ability), Mighty Eagle, Mighty Dragon|
|Wood||Medium||Light brown||Red, Chuck, Bomb, Matilda, Hal, Terence, Bubbles, Mighty Eagle, Mighty Dragon||The Blues, Stella, Silver|
|Stone||Strong||Gray||Red, The Blues, Chuck, Hal (could almost destroy stones), Stella, Silver (mainly)|
The stone, wood and glass blocks protect the pigs from being popped. When the birds try to break a block, they will make a dent or either break it. Some birds such as Red and the Blues will not do much damage on blocks. However, The Blues can destroy glass pretty readily if aimed properly.
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|Angry Birds Seasons
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|Angry Birds Rio
|Angry Birds in Ultrabook™ Adventure
|Angry Birds Chrome