Glass

Ice (commmonly referred to as Glass) is light blue in color. Among the three kinds of blocks, this one can be easily broken by all kind of birds. Levels with these blocks are often provided with Blue Birds, as they are very good at breaking these blocks. It is suggested to multiply. the bird in front on the ice block to maintain the greatest strength of the bird. Most birds slow down when they hit glass, but Yellow Bird slows down after only breaking one bit of ice.

Tips

 * Blue Birds are very helpful on destroying ice, especially when "shotgunning"

Trivia

 * Strangely, Yellow Birds are weak against ice, despite ice having a much weaker strength than wood & stone
 * Boomerang Birds are good at destroying ice.
 * Two of Blue's other names, Icepick and Glassjaw, are based on his fondness of ice/glass.