Taphonomic signatures of early scavenging by black and turkey vultures.

Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE

Original Publication: San Francisco, CA : Public Library of Science

Falconiformes*/physiology; Animals ; Feeding Behavior/physiology ; Cattle ; Predatory Behavior/physiology ; Ecosystem

Scavenging is critical for nutrient cycling and maintenance of healthy ecosystems. While there is substantial research into the identification of taphonomic signatures from facultative mammalian scavengers, early stage scavenging signatures by vultures remain unknown. Further, some vulture species are opportunistic predators, highlighting the need to define signatures observed in the course of normal scavenging behavior. We placed stillborn neonatal calves in an unoccupied pasture and used motion-trigger camera traps to quantify scavenging effort, then conducted necropsies to evaluate the effect of black vulture (Coragyps atratus) and turkey vulture (Cathartes aura) scavenging effort on carcass consumption. We measured the order of consumption of different tissue types to delineate which anatomic structures vultures consume first. Scavenging trials with higher numbers of vultures feeding on the carcass for longer were associated with decreased remaining tongue and abdominal viscera, and a larger umbilical wound. Greater maximum flock sizes were associated with decreased remaining tongue and abdominal viscera, a larger umbilical wound, and greater biomass consumption. Black vultures targeted the perineum and tongue earlier, while turkey vultures targeted the eyes, perineum, and tongue. These results are consistent with the idea that vultures prefer tissues that are easy to access and contain high nutrient content. These patterns form a distinctive taphonomic signature that can be used to identify early scavenging by black and turkey vultures. Our results demonstrate that criteria commonly used to identify livestock depredation by black vultures only document vulture presence and not predation. This distinction implies that new and more definitive criteria need to be developed and put into practice for more accurate decision criteria in livestock depredation compensation programs.
Competing Interests: The authors have declared that no competing interests exist.
(Copyright: This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.)

J Forensic Sci. 2000 May;45(3):515-26. (PMID: 10855954)
Trends Ecol Evol. 2011 Mar;26(3):129-35. (PMID: 21295371)
J Forensic Sci. 2022 Nov;67(6):2203-2217. (PMID: 35957551)
Oecologia. 2013 Apr;171(4):761-72. (PMID: 23007807)
J Forensic Sci. 2009 May;54(3):523-8. (PMID: 19432736)
Proc Biol Sci. 2022 Nov 9;289(1986):20220843. (PMID: 36321491)
J Forensic Sci. 2018 Jul;63(4):1021-1032. (PMID: 29211936)
Sci Rep. 2019 Nov 8;9(1):16301. (PMID: 31705057)
J Forensic Sci. 2014 Sep;59(5):1333-42. (PMID: 24611615)
Forensic Sci Int Genet. 2013 May;7(3):397-404. (PMID: 23200859)
J Forensic Sci. 2015 Jan;60 Suppl 1:S11-20. (PMID: 25399906)
Proc Natl Acad Sci U S A. 2004 Dec 28;101(52):18042-7. (PMID: 15601765)
J Nutr. 2007 Jul;137(7):1815-20. (PMID: 17585036)
Infect Ecol Epidemiol. 2013 Nov 27;3:. (PMID: 24298326)
Forensic Sci Int. 2016 Sep;266:576.e1-576.e6. (PMID: 27430919)
PLoS One. 2017 Sep 26;12(9):e0185278. (PMID: 28950019)
Sci Rep. 2021 Feb 19;11(1):4254. (PMID: 33608624)
Forensic Sci Med Pathol. 2011 Dec;7(4):344-9. (PMID: 21533604)
J Forensic Sci. 2015 Nov;60(6):1426-35. (PMID: 26249734)
J Forensic Sci. 1989 May;34(3):587-606. (PMID: 2738562)
Forensic Sci Int. 2012 Jun 10;219(1-3):57-63. (PMID: 22204892)
Forensic Sci Int. 2020 Sep;314:110392. (PMID: 32619777)
J Theor Biol. 2004 Jun 7;228(3):431-6. (PMID: 15135041)
J Forensic Sci. 2013 Jan;58 Suppl 1:S20-5. (PMID: 23181511)
Nature. 2006 Jul 20;442(7100):265-9. (PMID: 16855582)

Date Created: 20240814 Date Completed: 20240814 Latest Revision: 20240817

20250114

PMC11324135

10.1371/journal.pone.0307610

39141675