The public is invited to join the Northern Neck Master Naturalists for a presentation by Pam Narney on “Sibling Rivalry in Osprey Nests” at 2 p.m. Tuesday in Murphy Hall at Westmoreland State Park. The park’s entrance fee has been waived for the day.

The Chesapeake Bay has one of the largest breeding populations of ospreys in the world. Because ospreys are at the top of the food chain and their diet is 99 percent fish, they are key indicators of aquatic health. The good news is that ospreys in this area are increasing. The bad news is that sibling rivalry results in violent injuries or death to some of the chicks, posing a threat to the continued population growth of ospreys.

Narney’s love of ospreys was one of the inspirations for the Colonial Beach Osprey Festival. Through her presentations at the first live festival and blogs on the Colonial Beach Osprey Festival website last year, she has shared that love with others, leading to increased awareness of this bird’s ecological ...