Seasonal Differences of Onions. 1  Available in yellow, red, and white from March through August. 2  Can be identified by their thin, lighter-colored skin. 3  Typically higher in water content, which reduces their shelf-life and makes them more susceptible to bruising. 4  Range in flavor from sweet to mild.
When a domesticated mare foals, she nurses the foal for at least four to six months before it is weaned, though mares in the wild may allow a foal to nurse for up to a year. The estrous cycle, also known as season or heat of a mare occurs roughly every 19â22 days and occurs from early spring into autumn. As the days shorten, most mares enter an anestrus period during the winter and thus do not cycle in this period.
Length of day plays a major role in the mare's heat cycle by influencing the hormones that control it. Horses are long-day seasonal polyestrous breeders, and mares typically come in heat about every 18 to 21 days from April to October.This is nature's way of ensuring that winter weather won't greet foals born 11 months after mating.orses are long-day seasonal polyestrous breeders, and mares typically come in heat about every 18 to 21 days from April to October. This is nature's way of ensuring that winter weather won't greet foals born 11 months after mating.