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dc.contributor.advisorBaccus, John
dc.contributor.authorJuergens, Paul W. ( )
dc.date.accessioned2020-06-01T14:17:41Z
dc.date.available2020-06-01T14:17:41Z
dc.date.issued2003-12
dc.identifier.citationJuergens, P. W. (2003). Wintering peregrine falcons (Falco peregrinus) on South Padre Island, Texas (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.
dc.identifier.urihttps://digital.library.txstate.edu/handle/10877/10518
dc.description.abstractThe Lower Laguna Madre Region of the Lower Texas coast is an important wintering area for a variety of birds many of which migrate from more northern latitudes. I studied Peregrine Falcons on South Padre Island (SPI), Texas, during winter 2001-2002 and 2002-2003. I captured falcons using standard falconry techniques and banded them with U. S. Fish and Wildlife Service aluminum leg bands. I captured 21 and 16 falcons in 2001-2002 and 2002-2003, respectively, and fitted 13 (2001-2002) and 6 (2002-2003) falcons with tail mounted radio transmitters to identify individuals throughout each winter. I analyzed mark-recapture data using the Jolly - Seber method, which provided an estimate of 6 to 9 falcons (x̄ = 7.05, SE= 0.42) on SPI in 2001-2002 and 7 to 14 individuals (x̄ = 8.9, SE= 1.2) in 2002-2003. The majority of falcons wintering on SPI were females with no detectable difference in number of adults or juveniles. In 2001-2002, falcons frequented the wind - tidal flat more than other habitats on SPI. In 2002-2003, more falcons frequented the vegetated barrier flat on the leeward side of the fore-island dune ridge. This switch in habitat may be in response to a greater prey base at more fresh water pools within the vegetated barrier flat than in 2001-2002, however, the wind-tidal flat still was important to falcons in 2002-2003. Within year site fidelity was common in falcons during both winters. In 2007-2003, 3 of 4 falcons returning to the island were faithful to certain areas on SPI within 2. 7 km of last encounter sites of the previous winter. The majority of prey eaten by peregrines consisted of shorebirds, primarily gulls (Larus sp.), which winter on SPI. I conducted a summer survey in 2002 and was unable to confirm the presence of any Peregrine Falcons on SPI between 19 May and 4 August.
dc.formatText
dc.format.extent70 pages
dc.format.medium1 file (.pdf)
dc.language.isoen
dc.subjectMigration
dc.subjectPeregrine falcon
dc.subjectFalcons
dc.subjectSouth Padre Island
dc.titleWintering Peregrine Falcons (Falco peregrinus) on South Padre Island, Texas
txstate.documenttypeThesis
dc.contributor.committeeMemberManning, Richard
dc.contributor.committeeMemberSimpson, Thomas
thesis.degree.departmentBiology
thesis.degree.grantorTexas State University--San Marcos
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
txstate.accessrestricted
dc.description.departmentBiology


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