Publications for Derek Gruar

Understanding the causes of decline in breeding bird numbers in England: a review of the evidence base for declining species in the woodland indicator for England.

The project will compare bird abundance data with land cover data, from habitat inventories and from the land cover map. It will assess the importance of different habitat types and their availability within the landscape in determining...

Date
01 January 2009
RSPB Authors
Derek Gruar
Authors
Charman, E.C., Carpenter, J. & Gruar, D.
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UK UK species Woodland

Drivers of population increase on an arable farm delivering a comprehensive suite of measures for farmland birds

In 1999, the RSPB purchased Hope Farm near Cambridge, a site with a simple arable crop rotation and a typical associated avian fauna. Since acquisition, the number of breeding territories of the Government’s “Quality of Life Farmland Bird...

Date
01 January 2010
RSPB Authors
Dr Tony Morris, Derek Gruar
Authors
Morris, A.J., Bailey, C.M., Winspear, R., Gruar, D.J. & Dillon, I.A.
Published in
Aspects of Applied Biology
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England Agriculture

Evidence of interspecific egg-dumping between tit species

Date
01 January 2009
RSPB Authors
Derek Gruar
Authors
Gruar, D.
Published in
British Birds
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Scotland UK species

Body condition, growth rates and diet of Skylark

Factors affecting the diet, body condition and growth rates of Skylark chicks were assessed to examine their relationship to their agricultural environment during a critical period in the life cycle o...

Date
01 January 2001
RSPB Authors
Dr Paul Donald, Derek Gruar
Authors
Donald, P. F. and colleagues
Published in
Ibis
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Skylark England Agriculture UK species

Characteristics of woods used recently and historically by lesser spotted woodpeckers

Lesser Spotted Woodpecker Dendrocopos minor numbers have declined greatly in England since the early 1980s for reasons that are not yet fully understood. It has been suggested that the species' decline...

Date
25 March 2010
RSPB Authors
Derek Gruar, Stephen Dodd
Authors
Charman, E.C., Smith, K.W., Gruar, D.J., Dodd, S. & Grice, P.V.
Published in
Ibis
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Lesser spotted woodpecker England UK species Woodland

Can hedgerow management mitigate the impacts of predation on songbird nest survival?

Nest predators can have significant impacts on songbird reproductive success. These impacts may be amplified by habitat simplification and here we test whether sympathetic management of farmland hedgerows can reduce nest...

Date
01 December 2016
RSPB Authors
Dr Jenny Dunn, Derek Gruar, Dr Will Peach
Authors
Dunn, J.C., Gruar, D., Stoate, C., Szczur, J. & Peach, W.J.
Published in
Journal of Environmental Management 184: 535-544.
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UK Agriculture UK species

Drivers of low breeding success in the lesser spotted woodpecker Dendrocopos minor in England: testing hypotheses for the decline

Capsule The breeding success of Lesser Spotted Woodpeckers Dendrocopos minor is now lower in England than previously reported and also lower than found in studies elsewhere in Europe. Aims To quantify...

Date
24 February 2012
RSPB Authors
Stephen Dodd, Prof Richard Gregory, Derek Gruar
Authors
Charman, E.C., Smith, K.W., Dillon, I.A., Dodd, S., Gruar, D.J., Cristinacce, A., Grice, P.V. & Gregory, R.D.
Published in
Bird Study
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Lesser spotted woodpecker England UK species

Pre-breeding foraging and nest site habitat selection by lesser spotted woodpeckers

Lesser Spotted Woodpeckers Dendrocopos minor have dramatically declined and retracted in range in Britain. Pre-breeding foraging may be critical and, although work has been carried out elsewhere in ...

Date
01 September 2012
RSPB Authors
Derek Gruar, Stephen Dodd
Authors
Charman, E.C., Smith, K.W., Dodd, S., Gruar, D.J. & Dillon, I.A.
Published in
Ornis Fennica
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Lesser spotted woodpecker England UK species

Land-use correlates of breeding performance and diet in tree sparrows Passer montanus

Chick diet varies seasonally and between wet and dry habitats, and there is little evidence for a link between habitat type and productivity. Aim To examine the influence of habitat compositio...

Date
01 September 2008
RSPB Authors
Dr Rob Field, Dr Guy Anderson, Derek Gruar
Authors
Field, R.H., Anderson, G.Q.A. & Gruar, D.J.
Published in
Bird Study
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Tree sparrow UK Agriculture UK species

Summer diet and body condition of song thrushes Turdus philomelos in stable and declining farmland populations

Summer diet and body condition were compared in two farmland Song Thrush Turdus philomelos populations in south-east England. One population on mixed farmland was stable and the other on arable farmland...

Date
01 January 2003
RSPB Authors
Derek Gruar, Dr Will Peach
Authors
Gruar, D. and colleagues
Published in
Ibis
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Song thrush England Agriculture UK species