Wh Where have ve our r curlew rlew gone? e? James - - PowerPoint PPT Presentation

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Mar 02, 2023 277 likes •644 views

Wh Where have ve our r curlew rlew gone? e? James Pearce-Higgins Director of Science British Trust for Ornithology Trailing bubbles of music over the squelchy hillside music as desolate, as beautiful as your loved places, mountainy

SLIDE 1

Wh Where have ve our r curlew rlew gone? e?

James Pearce-Higgins Director of Science British Trust for Ornithology

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Trailing bubbles of music over the squelchy hillside… music as desolate, as beautiful as your loved places, mountainy marshes and glistening mudflats by the stealthy sea…

Norman Alexander MacCaig (1910-1996)

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O, Curlew, cry no more in the air, Or only to the water in the West Because your crying brings to my mind Passion-dimmed eyes and long heavy hair That was shaken out over my breast: There is enough evil in the crying of wind.

W.B. Yeats (1865-1939)

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A ta tale le of

f los
ss

Over the past 20 years, the UK has lost half its breeding curlew In Ireland, only 500 pairs may remain

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A group

up prone
ne to

to exti tinct nction? ion?

Eurasian curlew Whimbrel Long-billed curlew Far Eastern curlew Slender-billed curlew Eskimo curlew Little curlew Bristle-thighed curlew

SLIDE 6

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Curlew lew in th the Brit itish ish Isl sles es

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Curlew lew in th the Brit itish ish Isl sles es

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The stead eady y lo loss s of Curle lew in in the Brit itish ish Isle les

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78% range e contractio raction n in in Irelan land, d, 17% in in Brit itain ain

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Reasons for decline: habitat bitat ch change ange

Grazing
Grassland improvement
Agricultural intensification
Bog drainage & peat

extraction

Vegetation change

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Reasons for decline: habitat bitat ch change ange

Afforestation

– displacement – edge effects – predator sources

Douglas et al. 2014 J Applied Ecology

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Reasons for decline: predation edation pressure ssure

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% annual change in breeding abundance

Reasons for decline: predation edation pressure ssure

Fletcher et al. 2010 J Applied Ecology

Gamebird

management

– predator control

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Reasons for decline: predation edation pressure ssure

Gamebird

management

– predator control

Douglas et al. 2014 J Applied Ecology

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Reasons for decline: cl climate imate ch change ange

Renwick et al. 2012 Diversity & Distributions

Projected decline of > 60% due to a warmer & drier climate

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Habi bitat tat change ange Clim imat ate change ange Predat dation ion pr pressur ssure Wh Where have ve our r curlew rlew gone? e?

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Vari riab able Effe fect ct on cu curle lew w abundanc dance Arable farming

−

Afforestation

−

Semi-natural grassland

+

Summer temperatures

−

Crow & fox abundance

−

Gamebird abundance

+

Strip burning

−

SLIDE 20

Vari riab able Effe fect ct on cu curle lew w abundanc dance Arable farming

−

Afforestation

−

Semi-natural grassland

+

Temperature

−

Crow & fox abundance

−

Gamebird abundance

+

Strip burning

−

SLIDE 21

Vari riab able Effe fect ct on cu curle lew w abundanc dance Arable farming

−

Afforestation

−

Semi-natural grassland

+

Temperature

−

Crow & fox abundance

−

Gamebird abundance

+

Strip burning

−

SLIDE 22

Vari riab able Effe fect ct on cu curle lew w abundanc dance Arable farming

−

Afforestation

−

Semi-natural grassland

+

Temperature

−

Crow & fox abundance

−

Gamebird abundance

+

Strip burning

−

SLIDE 23

Vari riab able Effe fect ct on cu curle lew w abundanc dance Arable farming

−

Afforestation

−

Semi-natural grassland

+

Temperature

−

Crow & fox abundance

−

Gamebird abundance

+

Strip burning

−

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Vari riab able Effe fect ct on cu curle lew w abundanc dance Popula lati tion

n ch

change Arable farming

− −

Afforestation

− −

Semi-natural grassland

+

Temperature

− − (rain +)

Crow & fox abundance

− − −

Gamebird abundance

+

Strip burning

−

Elevation / peat

− / −

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Vari riab able Effe fect ct on cu curle lew w abundanc dance Popula lati tion

n ch

change Arable farming

− −

Afforestation

− −

Semi-natural grassland

+

Temperature

− − (rain +)

Crow & fox abundance

− − −

Gamebird abundance

+

Strip burning

−

Elevation / peat

− / −

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Habi bitat tat change ange Clim imat ate change ange Predat dation ion pr pressur ssure

  

Wh Where have ve our r curlew rlew gone? e?

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Habitat use & home range Location every 15 min 2000+ locations

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Ha Habit itat at us use & hom home ran ange e of

wint ntering ering cu curlew ew

Graphic: Tina Smith & Nigel Hawtin

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Survi urvival val in n sp space ce & ti time

Changes over time? East vs. west differences in the UK?

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Wor

rking

king local

cally

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Wha hat ho hope fo for cur urlew? ew?

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Fi Finding nding co common

gr ground

und for
r a

so solution ution

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Ac Acknowledgements knowledgements

Saman antha tha Franks ks (B (BTO) ) le led the analy lysi sis s

f cu

curlew w data, a, which ch has been n publish shed ed in Bird d Study dy and is availab able e from: m: http:/ p://www www.tandfo tandfonline. ne.com/do com/doi/ab /abs/1 s/10 .1080/0 /0006 006365 3657. 7.201 2017. 7.135 135923 9233

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Ac Acknowledgements knowledgements

Analy lysi sis s of BBS jo join int-funded funded by BTO/J /JNC NCC/RS C/RSPB PB and the BTO Curlew ew Appea eal Donors & s suppo porter ers of the Curlew ew Appea eal Photo cr credits its: : Paul Hillion, Derek k Belsey ey, Lucy cy Wrigh ght, t, Tom Wallis, s, John Hardi ding, g, Jill P Pakenham, ham, Pip Gull llett, , Edmund mund Fell llowes wes, , Rach chel l Taylor

r, Hugh

h Insley, Anne Cotton, n, John Calladi dine ne, Iain Rober erts tson

n, Ruth

h Walker er, , Allan Drewi witt tt, , D Waist stel ell