Whenever possible aim for wood which has been used at the bottom of large structures as it is the weakest material and along with the planetary gravity can destabalise and bring down the structure when destroyed. Rock is the strongest material followed by ice.
A List Of The Birds and Their Abilities Currently In The Game Red Bird: no special abilities Purple Bird: zooms to where you touch on the screen Blue Bird(s): split into 3 Green Bird: bigger version of red bird Ice Bird: Freezes Objects Space Eagle: summoned by launching sardine cans Bomb Bird: explodes Atomic Bird (Orange): Inflates, then deflates
Red Bird: A powerful Bird that can be used to open the structures where the pigs are hiding.
Bomb Bird: This bird uses 'Heat Shock Wave' to blow away everything in space.
Lazer Bird: A very fast bird that can be used to destroy aliens on difficult locations.
Terence Bird: This bird destroys everything on his way like ice walls, stone or wood.
Blue Birds: A very powerful bird.
Space Eagle Bird: A new bird that you can unlock during gameplay or buy. This bird can be used to make a wormhole of destruction to easily finish a level. Note: you can only use this bird once every hour and you don't recieve any points or stars.
Ice Bird: Another new bird, this one is useful for freezing hidden enemies inside wall blocks.