Lava

Lava is a liquid in Angry Birds Seasons and Angry Birds 2 . Any bird, pig, or object that comes in contact with lava will be instantly destroyed or killed.

In Angry Birds 2, lava behaves differently. It has the same physics as water, but birds that come into contact with it get the same fire effect as a ring of fire would give them. Pigs and objects that are submerged in lava will slowly take damage until they are destroyed or killed. If the bird survives the lava, it will get the boost, but if it is very slow, it will take damage (and possibly become a corpse).