Ecology of Broad-winged Hawk · N=86, 2008. Goshawk records 2005-2009. PA Goshawk nest. Possible...
Transcript of Ecology of Broad-winged Hawk · N=86, 2008. Goshawk records 2005-2009. PA Goshawk nest. Possible...
Ecology of Broad-winged Hawk
Rosalie, June 2016
PA birdsPeruBrazilColombiaPanamaGuatemalaMexico
2016
2014-2017 paths
Rosalie’s path as of 11-14-2017
www.hawkmountain.org/birdtracker
3 PA birds wintering in Peru
Broadwing Journey
0100020003000400050006000700080009000
10000
Totalaverage
fallaverage
springaverage
adult
adult fall imm fall
Migration Distance (km)
Adult ---total = mean of 5000 milesJuvenile = 3500 miles
Migration rate/10 deg blockAdults –250 km/day(156 miles/day)JV -127 km/day
Stopovers
*Stops last 1 to 51 days*1 to 12 stops per journey*Average length 2-3 days*Habitat = 70% forested
Conserving PA’s Northern Goshawk
Identification
2006-2016 Migration Count trends
Northern Goshawk in Pennsylvania
-28%N=86, 2008
Goshawk records 2005-2009
PA Goshawk nest
Possible Threats?
Forest fragmentationLoss of hemlockWest nile virusHuman disturbanceFisher predationClimate change? How?
Pa Goshawk Project Website: www.biologicalsurvey.org
Results - preliminary
• 10 nests statewide confirmed in 2016
• 64 historic sites revisited, 4 on Kittatinny
• Several possible nest sites reported
• NONE found on Kittatinny Ridge but one subadult sighted in early season – migrant?
• More potential habitat to explore
• Turkey hunters, hikers, need to be notified more
Many Generous
Private Donors
& Indiegogo
Supporters
THANK YOU to Project Supporters and Sponsors!
Lancaster County Bird Club:
The Harold B. Morrin Scholarship