>All sorts of animal population follow a sigmoidal growth pattern where there's exponential growth, some degree of overshoot and then a return to a steady level

>All sorts of animal population follow a sigmoidal growth pattern where there's exponential growth, some degree of overshoot and then a return to a steady level somewhat below that peak. Animal populations usually decline because they lack food or have predators and other external factors. Not usually because of a lack of will to reproduce due to social or economic reasons.