Imperial Eagle in Czech Republic

Imperial Eagle in Czech Republic David Horal Agency for Nature Conservation and Landscape Protection of the Czech Republic

7th International Imperial Eagle Conference, Bratislava, Slovakia, 2-5 October 2013

year 20

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pairs

Population of IE in CZ 1998-2013

5

4

3

2

1

0

Breeding results, 1998 - 2013 37 breeding attempts, 26 successful breedings, 48 fledged young (min.: 2006, 2007 – 1; max.: 2012 – 9), 2 successfull replacements (2006, 2010)

1,30 fledged young / breeding 1,85 fledged young / successful breding

Photo: V. Gahura

Fledged young n (N = 37)

15 10 5 0 0

1

2

average 1.30

3

Soutok 2004, P. Horรกk

Breeding in CZ, 2010-2013

AQUHEL in CZ, 2010-2013, source: www.birds.cz/avif, 26.09.2013, N = 85

AQUHEL in CZ, 2010-2013, source: www.birds.cz/avif, 26.09.2013, N = 85

source: http://ndop.nature.cz

Losses (N = 12)

weather - windstorm weather - cold disturbance - forest works disturbance - anglers disturbance - tourists supposed predation

IV-V/2010, V. Škorpíková

IV/2010, Soutok

09/2011, M. Bierbaumer

age class 14 1

13 1

12 1

11 1

10 1

91

to

to

to

to

to

90

80

70

60

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40

15 0

14 0

13 0

12 0

11 0

10 0

to

to

to

to

to

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to

81

71

61

51

41

31

n (N = 26)

Age classes of forest stands with nests of IEs

8 6 4 2 0

Soutok, 2012, 140 years

Soutok 2010, Židlochovice 2010

Nesting tree species (N = 32) Oak - Quercus robur Poplar - Populus alba Pine - Pinus sylvestris Willow - Salix

Lednice, 2008 - 2010

Lednice 2010, Soutok 2010

Breeding territories, 1998-2013

Breeding territories, 1998-2013

Soutok – „Kessweide“ pair, 1998 – 2013, minimum convex polygon 84 ha

Soutok – „Lány“ pair, 2001 - 2004, minimum convex polygon 72 ha

Soutok – „Ledviny“ pair, 2004–2009 (-13), MCP 137 ha; AQUHEL-HALALB 585m

Soutok – „Hausbrunn“ pair, 2008 - 2013, minimum convex polygon 1222 ha

Lednice pair, 2008 - 2013, minimum convex polygon 79 ha

Trávní dvůr pair, 2010 - 2013, minimum convex polygon 8 ha

RINGING RESULTS 1998 – 2013, 42 pull. ringed (P. Horák 25, V. Gahura 1, H. Matušík 16) 39 of them fledged successfully 3 ringing recoveries – 2x Slovakia, 1x Austria

2 birds ringed abroad found in CZ, both coming from Slovakia • pull 2005 E Slovakia – 2006 Greece, 2007 CZ • ? pull 1994 E Slovakia – breeding female 2006 – 2013 Soutok, CZ LIFESPAN (HVM – Glutz et al. 1989): Aquila heliaca 21+ years – captivity (HVM – Glutz 1971); Slovakia – 10 years (Danko in Cepák et al. 2008) A. adalberti 44+, 27 – all in captivity (Glutz et al.

1989); 31 (González 2008); in wild – 18+, 19+, 21+, model 21-22 (Ferrer 2001)

Red dots – birds ringed in CZ Blue dots – birds ringed abroad

Soutok, 06/2013, photo: V. Gahura

Soutok, 06/2013, photo: V. Gahura

photo: V. Gahura

Acknowledgements: • • • • • •

† Petr Horák (1956 – 2005) V. Gahura, T. Bělka (photos) V. Škorpíková, H. Matušík (field data) V. Riedl, L. Poledník (maps) Prague Ringing Centre and J. Cepák T. Zuna-Kratky, K. Edelbacher, M. Bierbaumer (Austria) • P. Heralt, V. Beran, G. Čamlík, P. Štěpánek, P. Dedek and many other field co-workers.

photo: V. Gahura

Thank you for your attention.

David Horal david.horal@seznam.cz