You need to get the black bird right under all the blocks by hitting the support wood closest to the blocks. Make sure to not hit the wood that is touching the blocks themselves. Explode the bird when it is as close as it can be. Pure luck with how much stuff is destroyed. Pray for the blocks raining down to hit the rest of the blocks inside the cave

First bird is thrown backwards and needs to knock down the tower and get insane luck with how the TNT explodes. Then use Terrence to hit the stone balls (for some reason he gains power and speed) and he can sometimes go through all of the stones that held up the tower to the right

Just a matter of luck and patience with the one birder. Need to knock down the tower by hitting the first stone line and have red bounce back and hit the first pig.