Thestor montanus

{{Short description|Species of butterfly}}

{{Speciesbox

| image =

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| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Pringle, E.L. |year=2020 |amends=2020 |title=Thestor montanus |volume=2020 |page=e.T62123A175057446 |doi=10.2305/IUCN.UK.2020-2.RLTS.T62123A175057446.en |access-date=8 August 2021}}

| taxon = Thestor montanus

| authority = van Son, 1941[http://www.nic.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/papilionoidea/lycaenidae/miletinae/thestor/index.html Thestor] at Markku Savela's Lepidoptera and Some Other Life Forms

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}}

Thestor montanus, the mountain skolly, is a butterfly of the family Lycaenidae. It is found in South Africa, where it is found in fynbos covered high mountain slopes in the south-western West Cape, from Caledon to the Hottentots.

The wingspan is 23–28 mm for males and 27–29 mm for females. They can present both dark and pale color morphs.{{Cite book|url=https://books.google.com/books?id=wwhbDwAAQBAJ&q=%22mountain+skolly%22&pg=PT236|title=What's that Butterfly?: A starter's guide to butterflies of South Africa|last=Woodhall|first=Steve|date=2011-11-05|publisher=Penguin Random House South Africa|isbn=978-1-4317-0227-5|language=en}} Adults are on wing from October to February, with a peak in November. There is one generation per year.{{cite book|last=Woodhall |first=Steve |title=Field Guide to Butterflies of South Africa |year=2005 |location=Cape Town, South Africa |publisher=Struik |isbn=978-1-86872-724-7 }}