C-15 



OSPREY Pandion haliaetus 

 Order : FALCONIFORMES 

 Family : PANDIONIDAE 



Estimated Numbers: 



Virginia = 500 plus pairs; in 1972, 390 nests, 130 known 

 productive nests, 262 known young produced, 209 

 known fledglings (Byrd, 1973) . 



Delaware = 25 to 30 pairs 



Maryland = 750 pairs + 



Chesapeake Bay has largest known population in North America 



Present Distribution : 



Virginia - See map 2 of locations of nest sites provided by 

 Dr. M. Byrd, Dept. of Biology, College of William 

 and Mary, Williamsburg, Va. Also see Table I, Pro- 

 ceedings of the first North American Osprey research 

 conference (Byrd, 1973). 



Delaware - Information available at Delaware Dept. Natural 



Resources and Environmental Control (Lesser, 1973); 

 however, many of the sites are outside Chesapeake 

 Bay drainage. 



Maryland - See map 2, with nest site locations provided by Mr. 

 Stan Wiemeyer, Research Biologist, Patuxent Wild- 

 life Research Center, Laurel, Md.; and by Mr. Jan 

 Reese, researcher, St. Michaels, Md. 



Selected Areas with Active Nests : 



Virginia - James River 



Chickahominy River 

 York River 

 Mob jack Bay 

 New Pt. Comfort 

 Rappahannock River 

 Fleets Bay 



1970 1971 



3 



6 



- 



12 



11 



28 



15 



17 



50 



45 



57 



77 



17 



29 



