The Pennsylvania Game Commission and area conservationists are monitoring the Upper Bucks County nest and working to protect the area from intruders.
Eagles lay their eggs between March and April. Wildlife conservation officer John Papson says at this time of year, the eaglets are growing their feathers and beginning to learn how to fly on their own. They should be ready to leave the nest by late August.
The pair was first discovered last year in the same location with another nest of three eaglets.
The commission says bald eagles are known to be nesting in at least 47 of Pennsylvania's 67 counties. The tally of nests is expected to exceed 140 this summer.
