Three

The female Brimstone butterfl y managed to escape the chrysalis safely. She immediately scrambled upwards to hang on to the now empty pupal shell.She moves rapidly, spinning on the long axis to enable the pumping of haemolymph from the abdomen in to the wings. You may see the reddish tint as the fluuid flushes into the veins, expanding the wings. Any excess is expelled as meconium.
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[Milanie]

Great close-up and interesting information

[Denise Wood]

Great macro :)

[Jesika]

@milaniet @gilbertwood Thank you very much

[Thom Mitchell]

Gorgeous butterfly; gorgeous shot!
https://www.ukbutterflies.co.uk/species.php?species=rhamni

[Jesika]

@rhoing that’s the one, Thom. I was given an Alder Buckthorn in 2016 with one pupa. Watched and watched and of course he eclosed overnight! Since then Mrs B has visited every year and I have raised many caterpillars indoors, recording their intriguing metamorphosis. I think of all the species I have raised, the Brimstone is perhaps the easiest because the larvae are quite lazy and extremely photogenic.