What did Sara see?

Sara's airplane has a tracking antennae to detect radio signals from the cranes' leg bands as she flew over the area and looked for nests. In the previous photo, Sara drew a red box around the location of a pair. When she zoomed in she could see the female, two eggs, and the male nearby. Can you see them too? Why is it so important to not disturb nesting birds?

Photo: Sara Zimorski