He did not feel threatened because there were no predatory mammals or other natural enemies. He was a flightless species, so he built his nests on the ground without fear of attack. It probably laid only one egg per breeding season.
It is believed that the dodo used a reproductive strategy, the so-called K-life strategy, based on producing a small number of offspring, looked after for a long time (a strategy used primarily by birds and mammals). This protected the species from resource depletion and allowed them to better prepare their offspring for survival. It is also presumed that the dodo, as a tropical bird exhibiting a slower growth rate, took longer to reach full maturity.
