News Staff
Wednesday, July 8, 2026
Perhaps it was the unusually warm weather in March - 90-plus degrees, but some of the eastern bluebirds using the nest boxes on Fort Niobrara NWR were off to an early start in their nesting efforts this year. On April 4, the first time the boxes were checked, four of 15 were already in use by bluebirds, two of which held full clutches of eggs; five in one case and four in the other. That means these two nests were initiated (the first egg laid) before the end of March. Since some bluebirds winter in the area, ap p a re n t ly they just awaited sufficiently warm weather to initiate nesting. Of the other two nests, one had two eggs, and the other held nesting material (fine grass). All of these nests were very probably ultimately successful, fledging 18 young. Since boxes are checked once a week, the moment of fledging is seldom observed, and there exists the possibility that a snake predated the nest just a day or so before fledging. But usually a few droppings inside the nest indicate success since the parents remove them from the nest right up to the time of fledging.