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Otis tarda

大鸨

Source:IUCN

Taxonomy



 

Taxonomy in detail

Scientific name


 
Authority


 
Synonyms


 
Common names


 
Taxonomic sources
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Identification Information
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Taxonomic notes


 

Assessment Information

IUCN Red List Category and Criteria
Vulnerable A3cd+4cd ver 3.1
Assessment language
English
Year published
2017
Date assessed
2017-10-01 00:00:00 UTC

Assessment Information in detail

Previously published Red List assessments


 
Regional assessments
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Assessor(s)


 
Reviewer(s)


 
Contributor(s)
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Facilitator(s) / Compiler(s)
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Partner(s) / Institution(s)
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Authority / Authorities
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Justification
This species has suffered rapid population reductions across most of its range owing to the loss, degradation and fragmentation of its habitat, as well as hunting. Some populations in its Iberian stronghold have been suggested to have stabilised and possibly increased, although there is now some evidence for at least local declines in some areas in this region. Additionally, hunting in Central and East Asia results in high rates of adult mortality, and land-use changes in eastern Europe, Russia, Central Asia and Morocco may have a significant impact on this species's population and the extent of its remaining habitat, such that it is likely to decline at a rapid rate over the next three generations. It therefore qualifies as Vulnerable. Should research show the species to be declining at a more moderate rate, it would warrant downlisting to a lower category of threat.

Geographic Range

Native
Extant (resident)
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Extant
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Number of locations
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Geographic Range in detail

FAO Fishing Areas
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Estimated area of occupancy (AOO) (km²)
Continuing decline in area of occupancy (AOO)
Extreme fluctuations in area of occupancy (AOO)
Estimated extent of occurrence (EOO) (km2)
Continuing decline in extent of occurrence (EOO)
Extreme fluctuations in extent of occurrence (EOO)
Continuing decline in number of locations
Extreme fluctuations in the number of locationsN
RANGE DESCRIPTION
This species breeds in Morocco (45-50 birds [IUCN and HCEFLCD 2016, Alonso et al. 2016a]), Portugal (1,893 birds [per Alonso 2014]), Spain (29,400-34,300 birds [per Alonso 2014] although it could be lower than this [Y. Perlman in litt. 2017]), Austria (211-407 birds [R. Raab per J. C. Alonso in litt. 2016]), Germany (197 birds [Staatliche Vogelschutzwarte Brandenburg & Förderverein Grosstrappenschutz and T. Langgemach per J. C. Alonso in litt. 2016]), Slovakia (0-3 birds [per Alonso 2014]), Hungary (1,547 birds L. Miklós per J. C. Alonso in litt. 2016), Serbia and Montenegro (35-36 birds [per Alonso 2014]), Romania (0-8 birds [per Alonso 2014]), Turkey (700-1180 individuals [M. M. Karataş in litt. 2016]), Iran (43-48 birds [Barati et al. 2015]), Russia (8,000-12,000 birds in European Russia [per Alonso 2014], 500 individuals of the Asian subspecies in Eastern Russia [M. Kessler in litt. 2016]), Ukraine (520-680 birds [per Alonso 2014]), Kazakhstan (0-50 birds [per Alonso 2014]), Mongolia (c.1,000 birds [Palacín and Alonso 2008]), and China (c.500-3,300 birds [Chan and Goroshko 1998, Alonso and Palacín 2010, M. Kessler in litt. 2012]); and a reintroduction scheme is currently taking place in the United Kingdom. Its Palearctic range is becoming increasingly disjunct and there have been rapid declines and some extinctions throughout eastern and central Europe (Bulgaria, Poland, Moldova [Palacín and Alonso 2008], Czech Republic [BirdLife International 2015]). Numbers have almost certainly declined in Czech Republic, Slovakia, Romania, Bulgaria, Poland, Moldova, Kazakhstan, Mongolia, Turkey and Morocco, and in most of the eastern distribution range (Chan and Goroshko 1998, Barati and Amerifar 2008, Palacín and Alonso 2008, Alonso et al. 2016a, Palacín et al. 2016, M. M. Karataş in litt. 2016), along a with a range contraction due to the disappearance of smaller populations across the species's range (e.g. in Iberia [Alonso et al. 2003, Alonso et al. 2004] and Hungary [Faragó 1993]). The species is now absent from much of its range in Iran, with West Azarbayjan the only region where conditions remain suitable for the species (Barati et al. 2015). Over the past half century the species has only rarely been sighted in Kyrgyzstan, Tajikistan and Azerbaijan where the species once bred (M. Kessler in litt. 2016). In contrast, the species has increased in Hungary, Austria, and Germany, Spain and Portugal (Alonso and Palacín 2010, BirdLife International 2015). The previous fluctuating trend in Russia has changed to a rapid decrease during recent years (Antonchikov 2008, 2011) with a decrease of 68-70% estimated for the period 1999-2011 (BirdLife International 2015). Only a small number of birds (~40) continue to breed in the Russian Caucasus and the species is listed locally as Extinct or Critically Endangered in most of the Russian steppe zone (Kessler 2016, M. Kessler in litt. 2016). Recent trends are unknown in some parts of Asia. The world population is estimated to be between 43,847 and 56,695 individuals (Alonso 2014), of which 57-70% occur in Spain and 15-25% along the lower Volga River (Alonso and Palacín 2010, Kessler 2014). Only c.1,200-2,000 (c.4% of the global population) of the eastern subspecies remain in east Asia (Kessler 2014).

Most populations of the western subspecies are partially migratory and 8,000-10,000 birds occur on passage or in winter in Ukraine arriving from the lower Volga River, though only c.4,100 were found in 2010 (Y. Andryushchenko in litt. 1999, 2017, M. Kessler in litt. 2016). In the past birds from northern Central Asia overwintered in large numbers in Turkmenistan and Azerbaijan, as well as Uzbekistan, and north-east Iran, sightings are now rare in these countries (Kessler and Smith 2014). The eastern subspecies breeds in Mongolia, eastern Russia, and north-east China is fully migratory, spending four months on migratory stopovers and four months on wintering grounds in central China (Kessler et al. 2013, M. Kessler in litt. 2016). 

Population

Current population trend
Decreasing
Number of mature individuals
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Population severely fragmented
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Continuing decline of mature individuals
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Population in detail

Extreme fluctuations
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No. of subpopulations
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Continuing decline in subpopulations
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Extreme fluctuations in subpopulations
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All individuals in one subpopulation
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No. of individuals in largest subpopulation
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Description
Alonso (2014) estimates the global population to number 43,847 – 56,695 individuals, rounded here to 44,000-57,000 individuals.

Habitat and Ecology

System
Terrestrial
Number of mature individuals
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Continuing decline in area, extent and/or quality of habitat
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Generation length (years)
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Congregatory
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Movement patterns
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Habitat and Ecology in detail

Habitat and Ecology
Originally a species of the Eurasian steppe, this species has acclimated to agricultural landscapes (M. Kessler in litt. 2016). It occurs in open, flat or somewhat rolling landscapes, usually with a mixture of crops (cereals, vineyards, fodder plants, in some countries also with steppic grassland [J. C. Alonso in litt. 2012]). The eastern subspecies inhabits both open steppe and forest steppe, including small forest openings (M. Kessler in litt. 2016). Areas with little or no disturbance and abundant supply of insects are required for successful breeding (Y. Andryushchenko in litt. 1999). Nest sites are selected in grassland, fallow or cereal fields (Rocha et al. 2013) (primarily alfalfa in Central Europe and wheat in Russia, Mongolia and Kazakhstan [M. Kessler in litt. 2016]) in areas of low patch-type diversity, far from human infrastructure and with good horizontal visibility (Magaña et al. 2010). The eastern subspecies nests in agricultural mosaics, open steppe, and adjacent to forest edge (Kessler 2015). It exhibits highly variable migratory behaviour across populations, including obligate winter migrants (Asia, Russia), facultative migrants (central European populations) and partial winter and summer migrants with differential migratory pattern by sex (Iberian populations) (Morales et al. 2000, Alonso et al. 2000, 2001, Palacín et al. 2009, 2011).

Classification scheme
Habitats Suitability Major importance

Threats

Use trade
Residential & commercial development
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Agriculture & aquaculture
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Energy production & mining
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Transportation & service corridors
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Biological resource use
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Human intrusions & disturbance
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Natural system modifications
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Pollution
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Geological events
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Climate change & severe weather
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Threats in detail

Threats
Key threats are increased habitat degradation, fragmentation and loss due to agricultural intensification, land-use changes and infrastructure development which has the potential to increase following land privatisation in eastern Europe (S. Nagy in litt. 1999, 2007, Nagy 2009) and Central Asia and is occurring in China (Chan and Goroshko 1998, M. Kessler in litt. 2016). Habitat loss and fragmentation continues as a result of ploughing of grasslands, intensive grazing, afforestation and increasing development of irrigation schemes, roads, power-lines, fencing and ditches. Mechanisation (ploughing and harvesting in particular), chemical fertilisers and pesticides, fire and predation all contribute to high mortality in eggs, chicks, juveniles and incubating females (Nagy 2009, Rocha et al. 2013). The expansion of road networks can also degrade the species's habitat as well as create disturbance for the species (see Torres et al. 2011, Raab et al. 2014). Hunting is a major threat in Morocco, Syria, Turkey, Ukraine, China, Kazakhstan, Uzbekistan and Mongolia (Y. Andryushchenko in litt. 1999, Chan and Goroshko 1998, P. Goriup in litt. 2007, Karakaş and Akarsu 2009, M. Kessler in litt. 2012, 2016, M. M. Karataş  in litt. 2016) and is expected to intensify as the paved road network in Mongolia expands. International tourists are known to hunt the species in East Asia (M. Kessler in litt. 2016). The species is also vulnerable to the indiscriminate poisoning of wild birds for trade in China (M. Kessler in litt. 2016). Collision with power lines are a major threat to the species (J. C. Alonso in litt. 2007, 2016, Nagy 2009, M. Kessler in litt. 2012) and wind turbines may also be a significant threat (S. Nagy in litt. 2012). The impacts of climate change may increasingly affect the species (see Nagy 2009, Alonso et al. 2016), with harsh winter weather causing adult mortality and heavier summer rainfall leading to loss of clutches (M. Kessler in litt. 2016). 

Classification scheme Threats
title scope timing score severity

Use trade

Use trade

Text summary


Text summary in detail

Conservation Actions Information
Conservation Actions Underway
CITES Appendix I and II, CMS Appendix I and II and CMS MoU for Middle European Populations in place since 2002. EU Wild Birds Directive Annex I, Bern Convention Annex II, Bonn Convention Annex I (S. Nagy in litt. 1999, 2007, P. Goriup in litt. 2007). A European action plan was published in 1996 and updated in 2009 (Nagy 2009) and an action plan for east Asian populations in 1998 (Chan and Goroshko 1998). An Action Plan for Morocco was produced in 2016 (IUCN and HCEFLCD 2016). Agri-environmental and land management programmes have been (successfully) implemented in Spain, Portugal, Austria, Hungary, Germany, Serbia. Hunting of the species has been prohibited by the Central Hunting Commission in Turkey since 1977, an action plan was published in 2004 (Doğa Derneği ve T.C. Çevre ve Orman Bakanlığı, Doğa Koruma ve Milli Parklar Genel Müdürlüğü 2004) and survey counts have been successfully carried out across the country (M. M. Karataş in litt. 2016). Artificial incubation and chick rearing projects have been established in Germany and Hungary since the 1970s. A UK reintroduction project began in 2003 with chicks imported from the Russian Federation and later Spain (Dawes 2008) that has established a small population, although continued monitoring and supplementing is still needed (Burnside et al. 2012). A LIFE Nature project for the species was implemented in Hungary during 2004-2008 with the aim of increasing in-situ protection of the species (Bankovics and Lóránt 2008). Other LIFE projects for the species have been implemented in Spain, Portugal, Germany, Austria and Slovakia. Using power line markers and using underground cables instead of over-head powerlines have been shown to reduce mortality in this species (Raab et al. 2012).

Conservation Actions Proposed
Coordinate conservation actions between range states in Asia, where the species is fully migratory (M. Kessler in litt. 2016). Conduct nationwide surveys in countries with currently low quality estimates, to confirm worldwide numbers and trends. Research limiting factors, and investigate its vulnerability to climate change, metapopulation dynamics and the causes of reproductive failure in East Asia (M. Kessler in litt. 2016). Research wintering distribution in Russia, Ukraine and Asia. Protect and manage breeding, wintering and stop-over areas. Identify remaining breeding sites in Central and East Asia, as well as upgrade existing and establish new protected areas in this region (M. Kessler in litt. 2016). Establish protected areas and strict conservation measures in Morocco, the only African population of the species (J. C. Alonso in litt. 2016). Implement agri-environment measures for low-intensity farming. Prevent steppe fires, stubble burning, illegal hunting and collision with power-lines. Re-route or bury overhead cabling at areas in which Great Bustards gather (M. Kessler in litt. 2016). Raise public awareness. Research wintering movements in eastern and south-eastern Anatolia (M. M. Karataş in litt. 2016).

About us
本项目由中国科学院A类战略先导专项“地球大数据科学工程”及中国科学院十三五信息化建设专项“科学大数据工程”提供支持,旨在整合物种的评估与保护信息,为生物多样性保护提供数据支持。
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