Most Pikas live in colder climates, on rocky mountain slopes, in Asia, North America and parts of Eastern Europe. They are active during the day or the twilight, that is at nightfall, and in early morning. Pikas do not hibernate. They collect hay, which they pile up to dry. They sometimes steal hay from each other. This often results in disputes. Predators, like ferrets, and large birds often use such disputes to catch pikas. 