Nowhere near as bad as squirrels, but the house sparrows drive other birds away. It's ironic that in their native England, their numbers are dwindling. I'd happily ship 'mine' over there to restore the population.
Judging by the hordes that keep plundering my own, my father's, and our neighbours' feeders, they are not an endangered species in Germany. ;-)
I sometimes chase them off to give the other birds a chance. Though I got a very resolute cardinal that doesn't allow those vikings any liberties; and our blackbirds drive even the magpies and red jays off. They are cruise missile fighters. :-)
I got as far as "sparrow" and then had to look it up -- we have so many kinds of sparrows in the yard, all mixed together, that I don't even try to keep them straight -- but it is a male house sparrow. If I really care which species I'm seeing, I'll look it up (we have a really good little bird book by Stan Tekiela called The Birds of Michigan that lives in the bookshelf next to the computer -- there seems to be one for Ohio, too).
If you want to learn more about birds and birding, look up Laura Erickson (she has several bird blogs) in your favorite search engine and look up her books in your favorite bookstore.
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http://www.birdsource.org/Birds/chickadees/
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I sometimes chase them off to give the other birds a chance. Though I got a very resolute cardinal that doesn't allow those vikings any liberties; and our blackbirds drive even the magpies and red jays off. They are cruise missile fighters. :-)
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iBird is both the most expensive and best app I have on my phone.
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K.
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