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I made this bird feeder because I didn't want to drill any holes into the building where I live, so this just plops in place in the window sill and is good to go. It will work in any modern window.

Step 1: Gather Needed Items

1-Frame--I used an old screen print frame, but I bet any old frame would work.
2-Mesh or Screen--for bottom of tray, something permeable, but that seed won't fall through
3-1/2" or 3/4" piece of wood the same length of the longest side of the frame you chose
4-L-shaped fastener with screws
5-Long nails or Screws, a hammer, and a drill if you have one
6-Bird seed

Screw the L-shaped fastener onto the wood plank as pictured, so that it will latch over the lip of the window sill. Screw another one to the other side of the wood plank.

Step 2: Fasten Mesh to Tray Bottom

Nail into place the mesh you chose for the bottom of the tray. In my case, I used an old bamboo-like window blind. I cut out the shape I needed and nailed it all into place on all four sides so that it wouldn't buckle anywhere.

Step 3: Attach Tray to Wood Plank/fastener

Use long nails or long screws and attach the frame to the wood plank.

Step 4: Install to Window

Put the bird feeder tray in place in the window--and keep in mind that if you don't attach something to the bottom to hold it in place, it will fall if you let go of it before you pull the window closed.

Add your seed. And hold in place and close the window.

Step 5: If You Build It, They Will Come

About two minutes after I added some seed, this little titmouse was the first customer.

Step 6: Invite Local Birds

This little warbler was the next to visit.

You can see the fasteners well in this photo.

Step 7: Finally

One of my cats caught wind of what was going on and the rest was history.
<p>Cool idea...wont work with my window but oh well...you could glue polystryrene to the bottom of the window, maybe washed pizza bases as polystyrene is a very good insulator and is flexible so it should create an air tight seal. It is also easier to hide and thus better looking than tape.</p>
This is fantastic, and precisely what I was looking for to use at our new apartment. Thanks for posting!

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Bio: Park5 is an atelier in Takoma Park, Maryland, just over the D.C. border. I design and create one of a kind home accessories and ... More »
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