I think that there will be some natural variation in them, just like in any species. Sometimes violets are white instead of violet for example. This is what drives evolution. If the bill works better crossed the other way, then that bird may be able to produce more young and the trait will pass to the next generation.
Bea Bea Harrison 830-313-0610
-----Original Message----- From: Inland-nw-birders <inland-nw-birders-bounces...> On Behalf Of Tina wynecoop via Inland-nw-birders Sent: Sunday, February 22, 2026 5:38 PM To: Inland NW birders <Inland-nw-birders...>; Catherine Temple <ctemple99...> Subject: Re: [inland-NW-birders] Crossbills
Good question. I've been asking the same question for years. A well-respected local birder told me I asked the dumbest question. I know that is not a usual response - but I stopped asking it. Glad you have! Can't wait for the responses you receive. Tina
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________________________________ From: Inland-nw-birders <inland-nw-birders-bounces...> on behalf of Catherine Temple via Inland-nw-birders <inland-nw-birders...> Sent: Sunday, February 22, 2026 10:41 AM To: Inland NW birders <Inland-nw-birders...> Subject: [inland-NW-birders] Crossbills
Yesterday I saw a pair of red crossbills gathering grit in the road so I took some lovely photos of them. Later I noticed that each birds bill (a male and female) curved in a different direction. I know a lot has been said about the difference in bill size and the different "types" based on the types of cones they eat. But if the birds are the same species or type shouldn't the bills curve in the same direction? Or is it common to have left and right curved bills within the same type? Or is this a difference between male and female? I'm really curious as this is the first time I've been able to get close enough to see the differences. I've attached a photo of the pair. Thanks in advance if you can enlighten me. Catherine
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*Catherine Temple*
*Pet Portrait and Wildlife Artist*
*Clarkston, WA.(208) 791-7052* <ctemple99...>
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