Because it is so inclined! (A cline being a gradation in one or more characteristics within a species, especially between different populations).
Thus this woodland loving butterfly, common enough throughout much of the UK, appears dark brown with orange spots in the southerly regions as opposed to the white spotted sub-species here in the more Northerly climes of South Yorkshire.
UK Butterflies – the Speckled Wood
2 thoughts on “why does the butterfly change its spots?”
There is an owl, the Eastern Screech Owl, that comes in two color schemes and it is based on where it lives. Fascinating really.
Yes fascinating and does not seem to be an adaptive camoflague mechanism as for example, evident in the Peppered moth
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