The cause of the macaw not incubating eggs

It is normal to not hatch eggs. Usually it only hatches the first egg, and it will not hatch later.The breeding period of this bird began in November and continued until May of the following year. After the male and female birds were paired, they would find the hollow trunk, or to build a nest in the cave of the cliff.The output is also very small.Usually it is in estrus every two years, and each nest can produce 2-3 eggs.