A recent study published in the journal Biological Reviews has found that over one in six bird eggs fail to hatch, and hatching failure increases as bird species decline. Moreover, the experts discovered that hatching failure is a much bigger problem in the case of captive threatened species, with nearly half of their eggs failing to hatch. These findings provide evidence that conservation managers could use in their decision making for creating the best possible outcomes for endangered bird species recovery. By assessing 241 bird species...