Colias palaeno inhabits peat moss habitats such as raised mires and bogged taiga. There is a big Gladkoe Bog nearby but with very scarce Sphagnum and I doubt C. palaeno can breed there. The closest suitable habitats are situated some 100 km to the North. At the same time solitary females may migrate quite fast, perhaps in search for other suitable habitats. This is the fouth female of this species I see in the forest-steppe zone of West Siberia for my life, and the second in Novosibirsk. It is noteworthy that this happened on my 57th birthday.