After death, the unit stack can be restored to 20% of its original size. If there were initially fewer than five units (meaning 20% is less than one unit), there is a chance that no unit will rise from the ashes...
So, I've had this idea for a while that more units should be resurrected. It seemed like 4 units were resurrected from 10. And that's 40%. Today, I played a fixed map, and out of 9 enemy birds, 4 were resurrected! That's out of nine! So, either the calculation is incorrect, or I misunderstood something :D
За то что нейтралы не бегают за единичкой, для меня это уже стоит того