From Birds of North America:
Figure 4. Osprey chicks usually hatch sequentially, often up to 4–5 days apart, giving older chicks an advantage when food is limited. Photo by D. Schmidt from Schmidt 2001, used with permission.
Figure 4. Osprey chicks usually hatch sequentially, often up to 4–5 days apart, giving older chicks an advantage when food is limited. Photo by D. Schmidt from Schmidt 2001, used with permission.
An awesome fact to remember: the young osprey will be 90% full grown less than 30 days after hatching! Osprey fledge or first begin flying at about 55 to 60 days old.