Common winter bird.
Yes, crows are known to eat from bird feeders, as they are opportunistic feeders and will consume a variety of foods, including seeds and nuts found in bird feeders.
Most people will buy bird feeders to put in their garden to attract birds and help to feed them through the winter. Other common accessories are bird tables and bird houses.
Yes, robins typically do not eat from bird feeders as they prefer to forage for insects and worms on the ground.
Bird feeders can attract a wide variety of birds to your yard and provide extra food for birds when natural resources are low. However, putting out feeders requires responsibility:Bird feeders and areas around feeders must be kept clean or they can cause spread of diseases. Cleaning and disinfecting (with bleach solution 1 part bleach to 9 parts water) should be done monthly. Old seed and waste matter on or under the feeder must removed.Feeders should be attached to windows or placed more than 30 feet from windows so when birds are frightened they have a chance to avoid the glass.If you notice a natural predator such as a Cooper's Hawk hanging around, remove the feeder for a few weeks. The predator will move on.Outdoor cats are a major problem, killing millions of wild birds annually. If you have outdoor cats, especially feral cats, in your neighborhood, then you should not put out bird feeders or hang them high out of reach of cats. Some people put no climb fences around their feeders.Most Birds visit feeders to supplement their diets and do not become completely dependent on feeders because they require a variety of foods to meet their dietary needs. However, if you keep feeders going through winter, do not cease filling feeders mid winter or during harsh weather as birds that are in the "habit" of visiting feeders, will have an easier time finding food.
Bird feeders and bird baths.
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
Predators.
Mostly from the ground and Bird feeders
Since hummingbirds don't need us humans to tell them when to migrate, you can take your feeder down whenever you want to, whether you're still seeing hummingbirds or not. Ruby-throated Hummingbirds should have left Tennessee by the first frost, so that's a good time to take your feeders in for the season.