I find it fascinating! For me the most curious sexual dimorphism is where closely related species are different: eg Orange Tip butterflies (as you mention) show obvious sexual dimorphism, but other white butterflies don't. House Sparrow males and females look very different, the closely related Tree Sparrows don't (or at least not to human eyes!).
I find it fascinating! For me the most curious sexual dimorphism is where closely related species are different: eg Orange Tip butterflies (as you mention) show obvious sexual dimorphism, but other white butterflies don't. House Sparrow males and females look very different, the closely related Tree Sparrows don't (or at least not to human eyes!).
Ah that’s so interesting I didn’t know that about tree sparrows 😊thank you for your comment Juliet!