no they dont
I don't know but I know some birds eat seeds and berries.. this is not an answer to Rather or not birds species eat only plant material , this only means that some birds are omnivorous (eat both plant-material and meat/insects) like us!
All blackbirds (no matter what species) have an omnivorous diet that consists of grains, weed seeds, fruits, and insect
They all kinds of grains and some seeds.
Beans, grains, and nuts are all forms of seeds.
no,not necessary that all birds do the same...
Birds eat all food sources, though individual birds do not use all the foods available. Some, such as crows and Blue jays, are generalists able to use a variety of foods, birds like eagles eat only meat, warblers only insects, and cardinals only seeds. Birds can eat seeds, insects, nectar, meat, berries, and plant material, depending on their physical adaptations to do so.
Birds that come to bird feeders may relish a treat of dried pumpkin seeds. It means, of course, that you'll have to clean them out of the shell and bake for an hour or so at about 250 degrees. When they're ready, just put them out on a platform feeder and watch what happens.
most eat seeds and berries
Nesting birds eat all different kinds of food. They will eat sunflower seeds, cracked corn, millet, suet cakes, and nyjer seeds.
Truly, i think it would be OK. Although, you may get sick.
Mostly smaller birds eat "bird seed" such as budgies and other small parakeets.
Some examples of foods that start out from seeds include nuts (such as almonds, peanuts, and cashews), grains (such as rice, wheat, and quinoa), legumes (such as beans, lentils, and chickpeas), and fruits (such as apples, oranges, and watermelon).