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~ a celebration of nature

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Tag Archives: genetic mutation

Genetic mutation leads to immigration

13 Thursday Apr 2017

Posted by sconzani in birds, nature

≈ 2 Comments

Tags

birding, birdwatching, Collared dove, genetic mutation, Mutation affected sense of direction, Streptopelia decaocto

I came across the delightful bird in the series of three images below during a recent walk around Cardiff Bay. Sitting quietly in a tree by the footpath, it was indulging in a good preening, running its beak repeatedly down through its fluffed-up chest feathers. It’s a Collared dove (Streptopelia decaocto), a bird you’re often more likely to hear than to see, its continuous cooing floating down from the leafy trees where it’s sitting.

170413 Collared dove (1)
170413 Collared dove (2)
170413 Collared dove (3)

Amazingly, these birds only immigrated to Britain in the 1950s – they’re native to the Middle East but gradually spread across Europe before crossing the Channel, and they’re now very common garden visitors in villages and towns across the country. In Fauna Britannica, Richard Mabey notes that this incredible spread, more than any other European bird in the past 50 years, has been attributed to ‘a genetic mutation that affected the birds’ sense of direction and encouraged them to move north and west’, though the British Trust for Ornithology believes natural selection has probably now reduced this tendency. If it hadn’t, the birds would all be flying off over the Atlantic, a trip they probably wouldn’t survive.

170413 Collared dove (4)

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Pretty in pink

02 Thursday Jun 2016

Posted by sconzani in insects, nature

≈ 13 Comments

Tags

Chorthippus parallelus, genetic mutation, Kenfig National Nature Reserve, Meadow grasshopper, pink grasshopper

If someone had told me before last Saturday that there was such a thing as a pink grasshopper living in Wales, I would’ve laughed and assumed they were having me on … but, as they say, seeing is believing.

160602 Meadow grasshopper (1)

This is another of the amazing creatures I encountered at Kenfig National Nature Reserve last weekend. It’s a Meadow grasshopper (Chorthippus parallelus), a common species throughout Europe and in parts of Asia. With its lake and ponds, and its frequently damp dune slacks, Kenfig has the perfect habitat for this grasshopper which prefers moist vegetation rather than a dry environment. Although green is the most common colour, the Meadow grasshopper can also be completely or partially brown, a reddish-purple and, yes, pink. It appears that the pink colour is a result of a genetic mutation during the reproductive cycle, similar to that which causes albinism. And it is definitely a she as, apparently, only the females are affected by this recessive gene.

160602 Meadow grasshopper (2)

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About me

sconzani

sconzani

I'm a writer and photographer; researcher and blogger; birder and nature lover; countryside rambler and city strider; volunteer and biodiversity recorder.

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