Rehabilitation centres help injured animals to recover and return back to the wild. This study aimed to analyse trends in intake and outcomes for the common kestrels (Falco tinnunculus) admitted into rehabilitation centres in the Czech Republic. From 2010 to 2019, a total of 12,923 kestrels were admitted to 34 rehabilitation centres with an increasing trend (rSp = 0.7697, P < 0.01) being found during the monitored period. Subadult kestrels (34.70%) and kestrels injured by power lines (26.57%) were most often admitted. Most kestrels in the rehabilitation centres died or had to be euthanized (81.66%), only 15.90% of the birds could be released back into the wild. The median length of stay in rehabilitation centres for kestrels that were subsequently released was 35 days. Considering survival rates, the most critical threat to kestrels was poisoning (100% of the cases resulted in death) but mortality of the kestrels admitted for most other reasons also exceeded 80%. Given the low success rate of the care of kestrels in rehabilitation centres and the relatively small proportion returned to the wild, it is essential to eliminate the causes leading to their admission, that is, to protect their natural habitats and to prevent unnecessary capture.

Department of Animal Hygiene Faculty of Veterinary Medicine University of Belgrade 11000 Belgrade Serbia

Department of Animal Protection and Welfare and Veterinary Public Health Faculty of Veterinary Hygiene and Ecology University of Veterinary Sciences Brno Brno 61242 Czech Republic

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McClure CJW, Westrip JRS, Johnson JA, Schulwitz SE, Virani MZ, Davies R, Symes A, Wheatley H, Thorstrom R, Amar A, Buij R, Jones VR, Williams NP, Buechley ER, Butchart SHM. State of the world’s raptors: Distributions, threats, and conservation recommendations. Biol. Conserv. 2018;227:390–402. doi: 10.1016/j.biocon.2018.08.012. DOI

Bernardino J, et al. Bird collisions with power lines: State of the art and priority areas for research. Biol. Conserv. 2018;222:1–13. doi: 10.1016/j.biocon.2018.02.029. DOI

Hager SB. Human-related threats to urban raptors. J. Raptor Res. 2009;43:210–226. doi: 10.3356/JRR-08-63.1. DOI

Molina-López RA, Casal J, Darwich L. Causes of morbidity in wild raptor populations admitted at a wildlife rehabilitation centre in Spain from 1995–2007: A long term retrospective study. PLoS ONE. 2011;6:e24603. doi: 10.1371/journal.pone.0024603. PubMed DOI PMC

Rodríguez B, Rodríguez A, Siverio F, Siverio M. Causes of raptor admissions to a wildlife rehabilitation centre in Tenerife (Canary Islands) J. Raptor Res. 2010;44:30–39. doi: 10.3356/JRR-09-40.1. DOI

Komnenou AT, Georgopoulou I, Savvas I, Dessiris A. (2005) A retrospective study of presentation, treatment, and outcome of fre-ranging raptors in Greece. J. Zoo. Wildl. Med. 2005;36:222–228. doi: 10.1638/04-061.1. PubMed DOI

Harris, M. C. § Sleeman, J. M. Morbidity and mortality of Bald Eagles (Haliaeetus leucocephalus) and Peregrine Falcons (Falco peregrinus) admitted to the wildlife center of Virginia, 1993–2003. J.Zoo Wildl. Med. 38, 62–66 (2007). PubMed

IUCN Red List. 2020. Common kestrel [online]. [vid. 31st 11. 2020]. Available from: https://www.iucnredlist.org/species/22696362/93556429

Smallwood JA, et al. Why are American kestrel (Falco sparverius) populations declining in North America? Evidence from nest-box programs. J. Raptor Res. 2009;43:274–282. doi: 10.3356/JRR-08-83.1. DOI

Wendell MD, Sleeman JM, Kratz G. Retrospective study of morbidity and mortality of raptors admitted to Colorado State University Veterinary Teaching Hospital during1995 to 1998. J. Wildl. Dis. 2002;38:101–106. doi: 10.7589/0090-3558-38.1.101. PubMed DOI

Costantini, D., Dell Omo, G., La Fata, I. & Casagrande, S. Reproductive performance of Eurasian Kestrel Falco tinnunculus in an agricultural landscape with a mosaic of land uses. Ibis156, 768–776 (2014).

Buck, A., Carrillo-Hidalgo, J., Camarero, P. R. & Mateo, R. Organochlorine pesticides and polychlorinated biphenyls in common kestrel eggs from the Canary Islands: Spatio temporal variations and effects on egg shell and reproduction. Chemosphere261, 127722; 10.1016/j.chemosphere.2020.127722 (2020). PubMed

Wienburg CL, Shore RF. Factors influencing liver PCB concentrations in sparrowhawks (Accipiter nisus), kestrels (Falco tinnunculus) and herons (Ardea cinerea) in Britain. Environ. Pollut. 2004;132:41–50. doi: 10.1016/j.envpol.2004.03.027. PubMed DOI

Pain DJ, Amiardtriquet C. Lead poisoning of raptors in France and elsewhere. Ecotoxicol. Environ. Saf. 1993;25:183–192. doi: 10.1006/eesa.1993.1017. PubMed DOI

Newton I, Wyllie I, Dale L. Trends in the numbers and mortality patterns of sparrowhawks (Accipiter nisus) and kestrels (Falco tinnunculus) in Britain, as revealed by carcass analyses. J. Zool. 1999;248:139–147. doi: 10.1111/j.1469-7998.1999.tb01190.x. DOI

Burfield IJ. The conservation status and trends of raptors and owls in Europe. Ambio. 2008;37:401–407. doi: 10.1579/0044-7447(2008)37[401:TCSATO]2.0.CO;2. PubMed DOI

González LM, et al. Causes and spatio-temporal variations of non-natural mortality in the vulnerable Spanish imperial eagle Aquila Adalbert during a recovery period. Oryx. 2007;41:495–502. doi: 10.1017/S0030605307414119. DOI

Sumasgutner P, Schulze CH, Krenn HW, Gamauf A. Conservation related conflicts in nest-site selection of the Eurasian kestrel (Falco tinnunculus) and the distribution of its avian prey. Landscape Urban. Plan. 2014;127:94–103. doi: 10.1016/j.landurbplan.2014.03.009. DOI

Sumasgutner P, Adrion M, Gamauf A. Carotenoid coloration and health status of urban Eurasian kestrels (Falco tinnunculus) PLoS ONE. 2018;13:e0191956. doi: 10.1371/journal.pone.0191956. PubMed DOI PMC

Rejt L, Rutkowvsi R, Gryczynska-Siemiatkowska A. Genetic variability of urban kestrels in Warsaw - preliminary data. Zool. Pol. 2004;49:199–209.

Riddle, G. S.The kestrel in Ayrshire 1970–1978. The Journal of the Scottish Ornithologists´ Club10, 200–216 (1979).

Forero MG, Tella JL, Donázar JA, Hiraldo F. Canister specific competition and nest site availability explain the decrease of lesser kestrel Falcon populations? Biol. Conserv. 1996;78:289–293. doi: 10.1016/S0006-3207(96)00011-0. DOI

Medica DL, Clauser R, Bildstein K. Prevalence of West Nile Virus antibodies in a breeding population of American kestrels (Falco sparverius) in Pennsylvania. J. Wildl. Dis. 2007;43:538–541. doi: 10.7589/0090-3558-43.3.538. PubMed DOI

Griffith JE, Dhand NK, Krockenberger MB, Higgins DP. A retrospective study of admission trends of koalas to a rehabilitation facility over 30 years. J. Wildl. Dis. 2013;49:18–28. doi: 10.7589/2012-05-135. PubMed DOI

Long RB, Krumlauff K, Young AM. Characterizing trends in human-wildlife conflicts in the American Midwest using wildlife rehabilitation records. PLoS ONE. 2020;15:e0238805. doi: 10.1371/journal.pone.0238805. PubMed DOI PMC

Lukesova, G., Voslarova, E., Vecerek, V. & Vucinic, M. Trends in intake and outcomes for European hedgehog (Erinaceus europaeus) in the Czech rescue centres. PLoS One16, e0248422; 10.1371/journal.pone.0248422 (2021). PubMed PMC

Crespo Martínez, J., Izquierdo Rosique, A. & Surroca Royo, M. Causes of admission and final dispositions of hedgehogs admitted to three Wildlife Rehabilitation Centres in eastern Spain. Hystrix25, 107–110 (2014).

Kelly A, Bland M. Admissions, diagnoses, and outcomes for Eurasian sparrowhawks (Accipiter nisus) brought to a wildlife rehabilitation centre in England. J. Raptor. Res. 2006;40:231–235. doi: 10.3356/0892-1016(2006)40[231:ADAOFE]2.0.CO;2. DOI

Kübler S, Kupko S, Zeller U. The kestrel (Falco tinnunculus L.) in Berlin: Investigation of breeding biology and feeding ecology. J. Ornithol. 2005;146:271–278. doi: 10.1007/s10336-005-0089-2. DOI

Carrillo J, González-Dávila E. Impact of weather on breeding success of the Eurasian kestrel Falco tinnunculus in a semi-arid island habitat. Ardea. 2010;98:51–58. doi: 10.5253/078.098.0107. DOI

Carrillo J, Aparicio JM. Nest defense behavior of the Eurasian kestrel (Falco tinnunculus) against human predators. Ethology. 2001;107:865–875. doi: 10.1046/j.1439-0310.2001.00718.x. DOI

Strasser EH, Heath JS. Reproductive failure of a human - tolerant species, the American kestrel, is associated with stress and human disturbance. J. Appl. Ecol. 2013;50:912–919. doi: 10.1111/1365-2664.12103. DOI

Baudains TP, Lloyd P. Habituation and habitat changes can moderate the impacts of human disturbance on shorebird breeding performance. Anim. Conserv. 2007;1:400–407. doi: 10.1111/j.1469-1795.2007.00126.x. DOI

French SS, González-Suárez M, Young JK, Durham S, Gerber LR. Human disturbance influences reproductive success and growth rate in California Sea Lions (Zalophus californianus) PLoS ONE. 2011;6:e17686. doi: 10.1371/journal.pone.0017686. PubMed DOI PMC

Halfwerk W, Holleman LJM, Lessells C, Kate M, Slabbekoorn H. Negative impact of traffic noise on avian reproductive success: Traffic noise and avian reproductive success. J. Appl. Ecol. 2011;48:210–219. doi: 10.1111/j.1365-2664.2010.01914.x. DOI

Ponce C, Alonso JC, Argandoña G, García Fernández A, Carrasco M. Carcass removal by scavengers and search accuracy affect bird mortality estimates at power lines: Bias sources affecting power-line bird mortality estimates. Anim. Conserv. 2010;13:603–612. doi: 10.1111/j.1469-1795.2010.00387.x. DOI

Lasch U, Zerbe S, Lenk M. Electrocution of raptors at power lines in Central Kazakhstan. Waldokologie Online. 2010;9:95–100.

Rubolini D, Bassi E, Bogliani G, Galeotti P, Garavaglia R. Eagle Owl Bubo bubo and power line interactions in the Italian Alps. Bird Conserv. Int. 2001;11:19–324. doi: 10.1017/S0959270901000363. DOI

López-López P, Ferrer M, Madero A, Casado E, McGrady M. Solving man-induced large-scale conservation problems: the Spanish Imperial Eagle and power lines. PLoS ONE. 2011;6:e17196. doi: 10.1371/journal.pone.0017196. PubMed DOI PMC

Bevanger K. Biological and conservation aspects of bird mortality caused by electricity power lines: A review. Biol. Conserv. 1998;86:67–76. doi: 10.1016/S0006-3207(97)00176-6. DOI

Janss GFE. Avian mortality from power lines: A morphological approach of a species-specific mortality. Biol. Conserv. 2000;95:353–359. doi: 10.1016/S0006-3207(00)00021-5. DOI

Eccleston, D.T. & Harness, R. E. Raptor electrocutions and power line collisions in Birds of Prey (ed. Eccleston, D.T. & Harness, R. E) 273–302 (Sarasola J, Grande J &Negro J, 2018).

Bevanger K. (2008) Bird interactions with utility structures: Collision and electrocution, causes and mitigating measures. Ibis. 2008;136:412–425. doi: 10.1111/j.1474-919X.1994.tb01116.x. DOI

Guil F, et al. Minimising mortality in endangered raptors due to power lines: The importance of spatial aggregation to optimize the application of mitigation measures. PLoS ONE. 2011;6:e28212. doi: 10.1371/journal.pone.0028212. PubMed DOI PMC

Sergio F, Marchesi L, Pedrini P, Ferrer M, Penteriani V. Electrocution alters the distribution and density of a top predator, the eagle owl Bubo bubo: Effects of electrocution on eagle owls. J. Appl. Ecol. 2004;41:836–845. doi: 10.1111/j.0021-8901.2004.00946.x. DOI

Mañosa S. Strategies to identify dangerous electricity pylons for birds. Biodivers. Conserv. 2001;10:1997–2012. doi: 10.1023/A:1013129709701. DOI

Guyonne FE, Ferrer M. Mitigation of raptor electrocution on steel power poles. Wildl. Society Bulletin. 1999;27:263–273.

Zoubi MYA, Hamidan NA, Baker MAA, Amr Z. Causes of raptor admissions to rehabilitation in Jordan. J. Raptor Res. 2020;54:273–278. doi: 10.3356/0892-1016-54.3.273. DOI

Montesdeoca N, Calabuig P, Corbera JA, Rocha J, Orós J. Final outcome of raptors admitted to the Tafira Wildlife Rehabilitation Centre, Gran Canaria Island, Spain (2003–2013) Anim. Biodivers. Conserv. 2017;40:211–220. doi: 10.32800/abc.2017.40.0211. DOI

Cooper JE. Raptor care and rehabilitation: precedents, progress and potential. J. Raptor Res. 1987;21:21–26.

Lam SW, Leenen LPH, van Solinge WW, Hietbrink F, Huisman A. Evaluation of hematological parameters on admission for the prediction of 7-day in-hospital mortality in a large trauma cohort. Clin. Chem. Lab. Med. 2011;49:493–499. doi: 10.1515/CCLM.2011.069. PubMed DOI

Sara R, Craig GA. A retrospective study of mortality and rehabilitation of raptors in the southern United States. J. Raptor Res. 2004;38:77–81.

Goldberg HK. Hearing impairment: a family crisis. Soc. Work Health Care. 1979;5:33–40. doi: 10.1300/J010v05n01_04. PubMed DOI

Molina-López RA, Mañosa S, Torres-Riera A, Pomarol M, Darwich L. Morbidity, outcomes and cost-benefit analysis of wildlife rehabilitation in Catalonia (Spain) PLoS ONE. 2017;12:e0181331. doi: 10.1371/journal.pone.0181331. PubMed DOI PMC

Molony, S.E., Baker, P. J., Garland, L., Cuthill, I. C. & Harris, S. 2007. Factors that can be used to predict release rates for wildlife casualties. Anim. Welfare16, 361–367 (2007).

Kirkwood J, Best R. Treatment and rehabilitation of wildlife casualties: legal and ethical aspects. Practice. 1998;20:214–216. doi: 10.1136/inpract.20.4.214. DOI

Naldo JL, Samour JH. Causes of morbidity and mortality in falcons in Saudi Arabia. J. Avian Med. Surg. 2004;18:229–241. doi: 10.1647/2002-013. DOI

Pain, D. J., Mateo, R. § Green, R. E. Effects of lead from ammunition on birds and other wildlife: A review and update. Ambio48, 935–953 (2019). PubMed PMC

Thompson LJ, Hoffman B, Brown M. Causes of admissions to a raptor rehabilitation centre in KwaZulu-Natal South Africa. Afr. Zool. 2013;48:359–366. doi: 10.1080/15627020.2013.11407603. DOI

Tintó A, Real J, Mañosa S. Predicting and correcting electrocution of birds in Mediterranean areas. J. Wildl. Manage. 2010;74:1852–1862. doi: 10.2193/2009-521. DOI

Kemper MK, Court GS, Beck JA. Estimating raptor electrocution mortality on distribution power lines in Alberta Canada. J. Wildl. Manage. 2013;77:1342–1352. doi: 10.1002/jwmg.586. DOI

Csermely D. Duration of the rehabilitation period and familiarity with the prey affect the predatory behavior of captive wild kestrels (Falco tinnunculus) B. Zool. 1993;60:211–214. doi: 10.1080/11250009309355812. DOI

Fischer D, Hampel MR, Lierz M. Monitoring of rehabilitated and evaluated grapevine medium Telemetry as success control. Tierarztl. Prax. K. H. 2014;42:29–35. doi: 10.1055/s-0038-1623740. PubMed DOI

Republic C. Act on the protection of animals against cruelty. Collection of Law. 1992;50:1284–1290.