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I know that birds have a large sternum in order to anchor the wing muscles. Bats also have wings, but don't have the same large sternum.

Is there a difference in either flying technique or anatomy which means bats are able to fly without the large sternum?

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  • $\begingroup$ I thought the reason might be related to their weight, I. e. no need for big sterna at low weight, but flying dogs don't have a bigger sternum either. $\endgroup$
    – KaPy3141
    Jun 18 at 23:30
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    $\begingroup$ There's really no "why" answer for questions like these, other than the fact that bats can survive & reproduce without one. $\endgroup$
    – jamesqf
    Jun 19 at 16:01
  • $\begingroup$ Did you google this at all? It takes about 5 seconds for me to find a link about how bat wings have muscles stretched across the back, which birds do not. $\endgroup$
    – swbarnes2
    Jun 21 at 17:07
  • $\begingroup$ @swbarnes2 I never thought of trying a different search engine. I just use Bing, the one my tablet automatically sends me to. I'll need to remember this for future researches. $\endgroup$ Jun 22 at 18:35

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