birds' interactions with the landscape - bto research from global to local
Post on 18-Jul-2015
350 Views
Preview:
TRANSCRIPT
Birds’ interactions with the landscape –BTO research from global to local
Dr Andy Clements, BTO
• Impartial evidence
• Professionals + 50,000 volunteers
• Extensive data + intensive research
• International
Not just counting birds
Photo: Chris Wernham
BTO BBS data 1967-2005. In Newton 2010. Photo: Jill Pakenham
Net population changes during the period 1967-2005.
Declining migrants
Satellite tracking
Unbiased information
Complete annual cycle
Actual migration track – route, stop-overs and wintering destinations
Interactions between conditions and events
Photo: Phil Atkinson
0102030405060
51 45 39 33 27 21 15 9 3 -3Degrees North
Num
ber
of d
ays
Sus
sex/
Ant
wer
p
Nor
ther
n It
aly
So
uthe
rn F
ranc
e
Afr
ican
coa
st
Arid ZoneHumid Zone
NW
Mor
occo
Nor
ther
nSpa
in
How long did they stop over?
Photo: Amy Lewis
16 June – 3 July16 June – 3 July
7 – 20 July7 – 20 July
25 July – 1 October25 July – 1 October
2011201120122012
7 June – 10 July7 June – 10 July
19 July – 19 August19 July – 19 August
28 August – 17 September28 August – 17 September
16 March – 2 April16 March – 2 April
16 March – 1 April16 March – 1 April
10-29 April10-29 April
8-13 April8-13 April
< FEBRUARY >< MARCH >< APRIL >
2012
1
2
3
4
2013
5
6
2
7
8
00000011112211111112212222333331235666755556777788877777777665245554443311111111000000000
Mean Duration 13.7 (7.8 sd) daysMean Total Duration 29.1 (8.2 sd) days
Timing of pre-Sahara crossing stopovers of Common Cuckoos in West Africa
Photo: Amy Lewis
23-Mar
10-Apr
12-Apr
14-Apr
16-Apr
18-Apr
20-Apr
22-Apr
24-Apr
26-Apr
28-Apr
30-Apr
02-May
04-May
06-May
08-May
10-May
12-May
14-May
2011 1
2
3
4
5
6
7
8
9 N O N E
2012 6
10
11
8
4 N O N E
2013 12
13
14
15
16
NN 1 1 1 1 1 1 2 2 3 5 5 5 9 10 11 13 13 14 15 15 13 14 13 12 12 12 11 9 4 3 3 2 2 2 2 2 0
Timing of pre-Sahara crossing stopovers of Common Swifts in West Africa
• Use of previously unsuspected stop overs in West Africa by several species
• Use of this stop over occurs when drought-breaking rains associated with ITCZ cause a burst of insect availability
• Spring migration strategies of particular importance as they have the potential to strongly influence arrival times of the early-breeding British populations
Data: Newson in prep. Photo: John Harding
Arrival datesD
iffer
ence
in m
edia
n ar
riva
l dat
e (d
ays)
Difference in median arrival date between Inland Observation Points (1963–66) and BirdTrack / Migration Watch (2002–10)
• c.40,000 observers
• c.19 million records
• >3,850 10-kms
• >182,000 TTVs
• >50,000 tetrads
• >500 species
Headline statistics
Photo: John Harding
Farmland birds
•Large range contractions 1970 – 1990
•No marked recent range expansions
•Continued range contractions in some species
Photo: Jill Pakenham
????. Photo: Chris Hewson
Deer and Nightingales
Habitat available Habitat used
Coppice >9 years (unprotected)
Young coppice with deer
Young coppice deer excluded
Photo: Edmund Fellowes
Photo: Rebecca Nason
Thanks to:
Sovon for the invitation to speak
Professor Ian Newton, FRS; Professor Tim Birkhead, FRS
BTO staff: Graham Appleton; Phil Atkinson; Dawn Balmer; Rob Fuller; Chris Hewson; Chas Holt; Dario Massimino; Nick Moran; Andy Musgrove; Nancy Ockenden; James Pearce-Higgins; Nicki Read; Paul Stancliffe; Mike Toms
Mike McCarthy
Cornell Lab of Ornithology, Ithaca NY USA
Ghana Wildlife Society; Naturama; RSPB; BirdWatchIreland; Scottish Ornithologists Club
Essex & Suffolk Water, BBC Wildlife Fund, Mark Constantine & The Sound Approach, and all our individual Cuckoo sponsors
Our fabulous BTO volunteers who have collected all the data
And to all of you for coming.
Happy Birthday Sovon
top related