(this may sound stupid but) how do birds somehow flap their wings fast and hard enough to fly(sorry for a dumb question). (repost bc one typo just got my entire post deleted)
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It doesn’t necessarily take a lot of flapping. Where I live there are a lot of gulls, which basically just stick their wings out sideways and hang-glide across the sky. They gain altitude by finding columns of rising air and then steering in circles around those columns.
But I guess you’re thinking of something more like a hummingbird…
I’m not sure what there is to say here. Birds have really strong breast muscles. Also they’re a lot lighter-weight than you would expect from their size. (For example, a California Condor has about double my wingspan but only about sixth my weight–and I’m *not* overweight for a human.)
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