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When will the Decorah North, Trempealeau, and Fort St. Vrain eagles begin laying eggs? At the nests we monitor in Iowa and Colorado, Bald Eagles typically lay eggs 5-10 days after productive copulation begins. In 2025, DNF laid her first egg on February 11, Mrs. T laid her first egg on March 4, and Ma FSV laid her first egg on February 22. Once an egg-laying pattern is established, Bald Eagles tend to lay eggs around the same date every year, with small shifts that we believe are influenced by w