* Food availability: Spring is when grasses and other vegetation are lush and plentiful. This ensures that the mare has access to high-quality food to support her pregnancy and provide enough milk for her foal.
* Favorable weather: Spring weather is generally milder, with longer daylight hours and less harsh conditions. This makes it easier for the foal to survive and thrive, with less risk of extreme cold or heat.
* Predator avoidance: Spring is often a time when predators are less active or distracted by their own breeding season. This reduces the risk of the foal being attacked.
* Increased daylight hours: Longer days allow the foal to get more sunlight, which is essential for vitamin D production and overall health.
* Evolutionary adaptation: This timing has likely evolved over time, ensuring the best chance of survival for both mare and foal.
It's important to note that while spring births are most common, some wild horses might foal later in the year depending on their specific environment and food availability.