Monitoring of a thriving Introduction - Aves...Monitoring of a thriving breeding population of Red...
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10/09/2014 1 Monitoring of a thriving breeding population of Red Kites Milvus milvus in Eastern Belgium Stef van Rijn & Paul Voskamp Introduction • Red Kite breeding bird survey 2000-2011 • Population development • Habitat preference of hunting Red Kites • Diet study by collecting prey remains & pellets Study area
Transcript of Monitoring of a thriving Introduction - Aves...Monitoring of a thriving breeding population of Red...
10/09/2014
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Monitoring of a thriving breeding population ofRed Kites Milvus milvusin Eastern BelgiumStef van Rijn & Paul Voskamp
Introduction
• Red Kite breeding bird survey 2000-2011• Population development• Habitat preference of hunting Red Kites• Diet study by collecting prey remains & pellets
Study area
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Atlas project 2001-2007
160 territoires
30 March 2008
25 March 2008
0
10
20
30
40
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60
2000
2001
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2006
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2008
2009
2010
2011
num
ber
of p
airs
territories, nonest found
occupied nest,no breedingobserved
occupied nest,unsuccessfulbreeding
successfulpairs
Population development
1,0
1,5
2,0
2,5
3,0
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
youn
g /
succ
essf
ul n
est Breeding results
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Amel-Emmels
Warche-Holzwarche
Our
Local differences in changes
0
5
10
15
20
25
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
Suc
cess
ful p
airs
Amel-EmmelsOurWarche-Holzwarche
Territory occupation & breeding success
N = 928
Amel-Emmels
Warche-Holzwarche
Our
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March
April
May & June
July & August
before breeding, n =700
0
20
40
60
80
100
% b
irds
expected
observed
breeding, n =62
0
20
40
60
80
100
% b
ird
s
nestling period, n =86
0
20
40
60
80
100
% b
ird
s
summer, n =153
0
20
40
60
80
100
humidgrassland
regulargrassland
built-uparea
% b
irds
A
B
Differences in size of parcels, number of landscape elements and gradients
A. Few Kites B. Many Kites
2 km
0%
20%
40%
60%
80%
100%
Mar Apr May Jun Jul
rest
frogs/toads/fish
young birds
passerines
large birds
large wild mammals
small livestock
large livestock
small mammals
Diet composition (N = 873) Fieldfare: a key species
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ThreatsConclusions
• Differences in population development and breeding success between areas
• Built-up areas with farms and agricultural areas are important habitats; semi-natural grasslands are relatively unimportant
• Gradients, small parcels and landscape elements probably important
• Food supply is depending on grasslands: intensification and crop change are a threat
with pictures of Ran Schols, Hugh Jansman, Jacob van der Weele & Michel Geven
![A GLOBAL UPDATE OF LEAD POISONING IN TERRESTRIAL BIRDS ...science.peregrinefund.org/legacy-sites/conference... · wild birds (e.g., Red Kites [Milvus milvus] in the UK, Pain et al.](https://static.fdocuments.us/doc/165x107/5f257cdb1d29162ae31a45c5/a-global-update-of-lead-poisoning-in-terrestrial-birds-wild-birds-eg-red.jpg)
