There is a table of recommended sizes for different species here: http://baltimorebirdclub.org/by/house.html#5d
Scroll down the page a bit.
because they might be cold
Although we can't smell bird food, birds can! It's surprising this is true but it is. Birds can smell seeds and nuts from long distances. If you have a birdfeeder and birds aren't eating from it you could try putting perches and/or a bird bath near the food. If this doesn't work try getting a different brand of bird seed. Hope I Helped! :)
Current Birds (not including Rio or other versions): Red Bird, Yellow Bird (wood-cutter), Blue Bird (triple), Black Bird (bomb), White Bird (bomber), Mighty Eagle (level beater), and Green Bird (boomerang). Aside from these birds, there is no new knowledge of any new birds coming into the game.
Mostly smaller birds eat "bird seed" such as budgies and other small parakeets.
If it's a large bird, it could be a wood stork.
No, bird houses are only for birds to nest in. You will need to get a bird feeder to feed the birds with.
No, bird houses do not require a perch for birds to use. Perches are not necessary for birds to enter or use a bird house.
Great Question! Birds are very picky. Bird houses should have a hole in them the size for the bird to barely fit into. Small birds like very small bird houses with very small holes. Larger birds like bird houses which have medium size holes, but much room inside. Some birds, like the black martin like to have a long approach path to their house, so their bird house must be on a very tall pole high above everything or they will not use it. Some birds just take what they can get. If you have a bird feeder and you get mostly little birds, hang a couple little bird houses in a nearby tree. If you want larger birds put their larger house in your back yard, hanging many size houses or too many bird houses in one tree I have found tends to leave empty houses. Birds are very social, but they are not like people, they do not like overcrowded homes.
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.
because they might be cold
Birds that commonly use bird boxes include bluebirds, chickadees, wrens, and titmice. These birds seek out enclosed spaces for nesting, so providing a bird box can attract them to your yard or garden. It's important to place the bird box in a suitable location and provide proper maintenance to encourage these birds to use it.
The dodo bird was heavier than other birds and couldn't fly.
black bird Crow
Kind of. But there are different bird colors and shapes.
Fish swim and birds fly.
Fish swim and birds fly.
Common winter bird.