Very little. In the UK, from three or four pounds (say $5). It may become a fairly expensive hobby filling up the feeders as bird seed can cost about £10 for a (large) bag.
One can purchase Droll Yankee bird feeders in a local store. However, it is much easier to find them online on a website such as Amazon, which sells a wide variety of items.
not for sale
91000
Bird feeders and bird baths.
There are different types of bird feeders. Some are fly through, which means it is open and the birds fly into it and eat. Then there are perch type bird feeders where the birds sit on perches and eat. There are also weight sensitive bird feeders where you can set the weight you want. If a bird is big, the openings in the bird feeder closes, keeping them out of the food. There are also squirrel-proof bird feeders which keep the squirrels out of your wild bird feed.
Yes there are modified bird feeders for many birds, for example a hummingbird feeder has small holes for their different beaks. There is no bird feeder for all birds.
You can get different types of bird feeders. I have a wild bird seed feeder and peanut feeders, and they attract the blue tit and finches, but mainly blue tits
all birds eat from bird feeders its just getting them there without them being spooked so they will come back
Mostly from the ground and Bird feeders
Predators.
Squirrel proof bird feeders can be purchases at Lowes, Target, and most local hardware stores. Some online sites that offer a variety of squirrel proof bird feeders are Best Nest and Wild Beaks.
one angry bird cost about 9.00