In the Skillcape Guide it stands "A tree with a bird's nest grows right in front of you. You take your handy axe and chop at it. With each chop, the tree gets shorter and shorter until the nest hits the stump, and you catch the egg on the edge of your axe." But its not and egg , is should stand: "A tree with a bird in it's nest grows right in front of you. You take your large axe and chop at it. With each chop, the tree gets shorter and shorter until the nest hits the stump, and the bird flyes up, you stomp on the nest and the bird lands on the edge of your axe." I got the Woodcutting Skillcape and can show if you want proof :