When trying to breed, these guys are VERY mobile. Whistling is nearly impossible alone. Put a Dino leash on MINIMUM setting and you can fit 2 inside circle and breed that way. They move a lot but are always close enough together to continuously mate.
These Creatures can only jump 3 times and a dash (Left Click, R2 or Right Trigger in mid-air) will not count as one. Thei ability to glide in mid-air while freezing their target proves useful to tribes. Like most mammals they have a gestation period which means you dont have to perfect a temperature to breed them. Level pure stam and Health. (The closer you are to the target while freezing it the more damage)