The duration of egg hatching varies depending on the type of egg and the species of the bird. In general, chicken eggs take about 21 days to hatch, while duck eggs take around 28 days. Here are some approximate hatching times for a few common bird species:

• Chicken: 21 days
• Duck: 28 days
• Goose: 28-35 days
• Turkey: 28 days
• Quail: 16-18 days
• Pheasant: 23-29 days

It’s important to note that hatching times can vary depending on factors such as temperature and humidity levels, as well as the quality and age of the eggs. Additionally, not all eggs will hatch successfully, so it’s important to monitor the incubation process closely and be prepared for potential losses.