How to Use Platform Bird Feeders
Amongst the many types of bird feeders that you can choose the most common, and easiest to make, are the platform bird feeders. This type of feeder has a flat tray like base with short sides that are only tall enough to keep the bird food from falling out. It should also have a roof to it to keep the food dry in case of rain or snow. It also needs to have some holes for drainage in case it does get wet. You do not want puddles to appear in the seed you are feeding to the birds. This can spoil the seed and so keep the birds form coming back. One way to avoid this is to use a wire screen bottom instead of having to put holes in a wooden or metal base. This takes care of any water problem.
If you are trying to attract a lot of birds then the placement of these feeders is very important. You will have more luck if they are not out in the open