Pennsylvania Game Commission Bureau of Wildlife Management Project Annual Job Report
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PENNSYLVANIA GAME COMMISSION BUREAU OF WILDLIFE MANAGEMENT PROJECT ANNUAL JOB REPORT PROJECT CODE NO.: 06715 TITLE: Peregrine Falcon Research/Management JOB CODE NO.: 71501 TITLE: Peregrine Falcon Investigations PERIOD COVERED: 1 July 2007 to 30 June 2008 COOPERATING AGENCIES: The Aark Wildlife Rehabilitation and Education Center, Newtown; Academy of Natural Sciences in Philadelphia; Berks County government (Court House and Services Center), Reading; Burlington County (New Jersey) Bridge Commission, Palmyra, New Jersey; Dauphin County Wildlife Rescue, Harrisburg; Delaware River Port Authority (DRPA); Delaware Valley Raptor Center, Milford; Delaware Water Gap National Recreation Area; Gloucester Marine Terminal, Gloucester City, New Jersey; Gulf Tower, Pittsburgh; Make a Wish Foundation, Pittsburgh; The National Aviary, Pittsburgh; New Jersey Division of Fish, Game, and Wildlife; Packer Ave. Marine Terminal, Philadelphia; Palmyra Cove Nature Center, Palmyra, New Jersey; Pennsylvania Department of Transportation (PennDOT); Pennsylvania Department of Environmental Protection (DEP); Pennsylvania Fish and Boat Commission; Pennsylvania Turnpike Commission; Philadelphia City Hall; PPL Corporation; Schuylkill Center for Environmental Education - Wildlife Division, Philadelphia; Three Rivers Avian Center, Brooks, West Virginia; Woodford Cedar Run Wildlife Refuge, Medford, New Jersey; Tri-State Bird Rescue & Research, Newark, Delaware; University of Pittsburgh; US Army Corps of Engineers; Western Pennsylvania Conservancy (WPC), Pittsburgh. WORK LOCATION(S): Statewide PREPARED BY: F. Arthur McMorris and Daniel W. Brauning DATE: 15 August 2008 ABSTRACT The long-term management goal of this project is to re-establish a self-sustaining peregrine falcon (Falco peregrinus) population in Pennsylvania (Brauning and Hassinger, 2001). Peregrine Coordinator Dr. Art McMorris and over 40 volunteers monitored peregrine falcon nests across the state. Eight new nests were identified, raising the total number of active nests from 16 to 24. The total number of nest sites occupied by pairs throughout the nesting season (24), the number of successful nests (15), the number of young produced (48), and the number of young fledged (43) were the highest since the beginning of the peregrine falcon recovery program. Forty of the 48 young were banded at the nest. Two of the new nests established during the 2007 nesting season were at natural cliff sites, but 1 of the 2 previously established cliff nests was abandoned, so the net number of cliff nests increased from 2 to 3. Fourteen band recoveries were obtained during the past year. The majority of these birds were identified breeding successfully, either in Pennsylvania or in other locations. The public was invited to 71501 2 attend peregrine falcon banding events at the Rachel Carson State Office Building (RCSOB) in Harrisburg and at the Gulf Tower and University of Pittsburgh Cathedral of Learning in Pittsburgh. Activities of Pennsylvania’s peregrine falcons attracted much favorable attention from the public and were well covered in the media. OBJECTIVES 1. The long-term management goal is to reestablish a self-sustaining peregrine falcon population in Pennsylvania. 2. The recovery levels proposed in the draft Management and Recovery Plan to upgrade the peregrine falcon’s state status from endangered to threatened, outlined in the revised Pennsylvania Recovery and Management Plan for the peregrine falcon, are a self-sustaining total of 15 breeding pairs (33% of the historic population), productivity of at least 1.25 young fledged per pair, and at least half of known pairs nesting successfully, each for 3 years. State de-listing is proposed to occur only after the establishment of self-sustaining population of a total 22 pairs on natural (cliff) sites statewide (50% of the historic total) for 3 years, and reproductive success on those cliffs must exceed 2.0 birds per active nest and on buildings/bridges exceed 1.5 birds per active site to assure a stable population. METHODS Peregrine Coordinator Dr. Art McMorris monitored peregrine falcon nesting activity in the Philadelphia area during the 2007 nesting season and coordinated over 40 volunteers and agency personnel in monitoring nests across the state. Video cameras, linked to live Internet connections, again monitored the nest site at the Rachel Carson State Office Building (RCSOB) in Harrisburg (Department of Environmental Protection [DEP] 2007), the Gulf Tower in Pittsburgh, and the Cathedral of Learning in Pittsburgh (Western Pennsylvania Conservancy [WPC] 2007, National Aviary 2008). Young falcons at nests within driving distance of Philadelphia were banded by Art McMorris; those in the Pittsburgh area were banded by other Pennsylvania Game Commission (PGC) personnel as noted below. RESULTS Peregrine falcons nested at 24 sites in Pennsylvania during 2007 (including bridges spanning the Delaware River on the Pennsylvania/New Jersey border). Young were produced at 17 sites and fledged successfully at 15 of the 24 sites. New nesting pairs were found at 8 sites: Allentown, Lehigh County; Columbia, Lancaster County; Reading, Berks County; Shikellamy, Union County; a cliff in Luzerne County; a power plant in Montour County; Etna, Allegheny County; and Monaca, Beaver County. Three of these 8 new nests were successful. The total number of nest sites occupied by pairs throughout the nesting season (24), the number of nests producing young (17), the number of successful nests (15) (defined as the number of nests that fledged young), and the number of young produced (48), banded (40) and fledged (43), were the highest since the beginning of the peregrine falcon recovery program. The locations of the nest sites, results of the 2007 nesting season, summaries of the results from previous years, and breakdown by nest type are given in Tables 1, 2 and 3, and Figure 1. Banding data is presented in Table 4. Table 5 gives the data for age and origin of the breeding adults that have been identified, and Table 6 presents the details for the band recoveries obtained during the reporting period. 71501 3 Nests in Philadelphia Area, Southeast (SE) Region Six Delaware River bridges, 2 Schuylkill River bridges and several tall buildings in the Philadelphia area were monitored for peregrine falcon activity. Nesting activity was observed at 8 sites and success was confirmed at 5, with a total of 16 young. One third of the Commonwealth’s peregrine falcon nest sites are in the Philadelphia area. Benjamin Franklin Bridge, Philadelphia County.--In 2006, activity was documented at this site for the first time in 11 years. The nest was active and successful again in 2007, and was monitored by volunteers Georgia and Barrie Ashby and several others. Two nestlings were observed when the nest was visited for banding on 29 May, but one nestling fledged prematurely, fell from the nest and died. The remaining chick (a female) was banded, and fledged successfully 2½ weeks later. On 19 June, 3 days after fledging, the fledgling was found on the bridge roadway (I-676). It was recovered by Delaware River Port Authority (DRPA) police and taken to the Woodford Cedar Run Wildlife Refuge in Medford, New Jersey, where it was evaluated and found to be uninjured and in good health. On the following day PGC personnel returned the fledgling to the nest. The fledgling was seen regularly during the following month, improving her flying skills. In mid-December the nest platform was modified to guard against the possibility of young falling from the nest in the future. Betsy Ross Bridge, Philadelphia County and New Jersey.--For the ninth year in a row, young were produced in a nest box located on the New Jersey side of the river. Four nestlings were banded on 23 May by Kathleen Clark of the New Jersey Division of Fish, Game, and Wildlife. Three of the eyasses were transferred to the Three Rivers Avian Center, Brooks, West Virginia, for hacking at a cliff in the New River Gorge, as part of a program to re-introduce peregrine falcons to this part of their historic range and to increase the number of cliff-nesting birds. Commodore Barry Bridge, Delaware County.--Activity at this site continues to be uncertain. A pair of peregrine falcons has been seen at the bridge during the nesting season, but no nest or young could be found by PGC personnel or volunteers monitoring from shore. However, the large size of the bridge makes it difficult to monitor adequately from shore. Bridge personnel have not found a nest or young during their routine maintenance activities, but there are large portions of the bridge that they rarely visit. Therefore, arrangements have been made so that PGC personnel can access the bridge itself to do inspections in the future. Girard Point Bridge, Philadelphia County.--The Girard Point Bridge was one of the first peregrine falcon nesting sites in Pennsylvania, and may have been the very first, after re-introductions were begun. The site continued to be productive in 2007. A nest box is present under the lower deck of the bridge at each end of the main span, but this year the falcons instead chose to nest inside a steel box beam overhanging the river. This location was judged to be unsafe for the young falcons because it afforded little room for the young to exercise their wings prior to fledging, and provided no good perch to return to after taking their first flights. Therefore, when the nest was accessed for banding, the young were moved to the nest box at the eastern end of the main span, which was a short distance away and in clear view of the box beam. Two females and 1 male were banded on 23 May and moved to the nest box. Within a short time the parents began attending the young at their new location, and all 3 fledged about 2 weeks later. At least two fledglings continued to be seen in the area throughout the summer. The alphanumeric color band on the nesting female was read, and she was identified as a bird that fledged from a nest in Ocean Gate, New Jersey in 2003 (Table 5).