Step 1: Tools Needed:
• Wood saw
• Hammer (or a screwdriver if using screws)
• Pencil or marker
(Optional) A drill with a hole saw (1"-2") or a drill bit for wood.
• A handful of 1,6mm x 40mm nails (woodscrews would be better choice, but they are more expensive)
• Two reclaimed wood planks from a pallet. Dimensions of my planks were (120cm X 9cm X 1,5cm)
Step 2: Mark and Cut
If your plank is about 9cm wide, cut them as shown in the images. If it is wider, you can still use my dimensions but the finished product will be wider.
You need to get following pieces:
• 2 pcs. 18cm length
• 4 pcs. 18cm on one side and 9cm on the other
• 4 pcs. 14cm length
• 2 pcs. 15cm length
Step 3: Put the Pieces Together
Step 4: Drill a Hole
Pay atention to the size of the hole. Most common sizes are from 1 to 2 inches in diameter. (2,5 cm to 5 cm).
Don't be affraid to experiment, larger holes will be suitable for larger birds, such as Finches (2"), Kestrels (3"), or even Owls (6"). Although smaller birds in such birdhouses will be prone to be evicted by predators or greater birds.
If drill or the hole saw is not available, you can cut a sizeable notch on the sides of both front pieces. Residents won't mind if the entrance is not circular. It just need to be big enough to fit through.
Step 5: Improvise
Be carefull with addition of perches, as Carpenter Guy mentioned, they can help predators to squeze inside or reach nestlings.
Tips for painting:
• Do not paint or varnish the house interior, which could and most likely will be toxic for residents.
• For exterior painting, choose natural colors that blend with the surroundings.