Here is a listing of all the birds. Pick one and get the achievement.
1. From the start, make a left towards a room, bird is on the table.
2. In the kitchen area. Open the Refrigerator, bird is inside.
3. In front of the large mirror in the basement.
4. At the edge of the stairs upstairs, head into the opposite hallway. Enter the 2nd door to your left. The bird is underneath the flipped-over bathtub, lift it up & grab sledgehammer in the closet.
5. Same hallway, enter room on the right, bird is on the bed.
6. In the same room, break the lock on the door with the sledgehammer and go upstairs into the attic. Make a right and you should see a black bird lying on the floor before the entrance into the back room. Keep your sledgehammer because you can take out Mr.. twinsticks with one hit.