'overwinter' is a correct word in written English.
It means to pass the winter or survive the winter. It can be used in any situation where something or someone is enduring or surviving the winter season. Example: "The birds will migrate to warmer regions to overwinter and return in the spring."
They might spend their summers doing the English Season in Glyndebourne or Henley, and then overwinter in the warmth of Mombasa.
Adults generally overwinter beneath convenient objects.
Some overwinter in aggregations with individuals of their own species, usually under bark or in fallen trees.
The larvae of certain species overwinter in these nests, whereas others overwinter as eggs.
The mourning cloak (Nymphalis antiopa), known as the Camberwell beauty in England, overwinter as adults.
Thus defined, hibernators include many fishes, amphibians, and reptiles that overwinter with body temperatures near freezing, as well as bears and a few other mammals that spend most of the winter sleeping in dens.
Spores overwinter in soil and in corn litter and then infect the next year's planting.
In addition, millions of endangered monarch butterflies (Danaus plexippus) migrate annually between regions of the United States and Mexico's western Mesa Central to overwinter on about a dozen forested peaks, particularly in eastern Michoacán state.
Entomologists using behaviour rather than morphology as a major taxonomic criterion have found that five of the six species have distinct songs; that four of them overwinter as nymphs, the other two chiefly as eggs; and that, to a considerable extent, the habitat preferences are different i.e., one species lives in abandoned fields, another in leaf litter of open woodland.
Insects may overwinter as egg, larva, nymph, pupa, or adult; because they can stand very low temperatures, few of these forms die if the winter temperatures are within their normal range.
Because many insect species have more than one generation of progeny per year, the prothoracic glands do not cease functioning except at some stage in the life cycle of the brood that must overwinter.
