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Auteur Derek J. Gruar |
Documents disponibles écrits par cet auteur (5)
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Article
Elisabeth C. Charman, Auteur ; Ken W. Smith, Auteur ; Ian A. Dillon, Auteur ; Steve Dodd, Auteur ; Derek J. Gruar, Auteur ; Andrew Cristinacce, Auteur ; Phil V. Grice, Auteur ; Richard D. Gregory, AuteurCapsule 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 the breeding success and identify the causes[...]![]()
Article
Rob H. Field, Auteur ; Guy Q. A. Anderson, Auteur ; Derek J. Gruar, AuteurCapsule 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 composition and diversity on Tree Sparrow productivity [...]![]()
Article
Rob H. Field, Auteur ; Guy Q. A. Anderson, Auteur ; Derek J. Gruar, AuteurCapsule 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 composition and diversity on Tree Sparrow productivity [...]![]()
Article
Elisabeth C. Charman, Auteur ; Ken W. Smith, Auteur ; Derek J. Gruar, Auteur ; Stephen Dodd, Auteur ; Philip V. Grice, AuteurLesser 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 may be linked to the increase in Great Spot[...]![]()
Article
Elisabeth C. Charman, Auteur ; Ken W. Smith, Auteur ; Steve Dodd, Auteur ; Derek J. Gruar, Auteur ; Ian A. Dillon, AuteurLesser 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 Europe our knowledge of habitat requirements fo[...]



