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ABSTRACT
Capsule: We quantify Red-billed Chough Pyrrhocorax pyrrhocorax diet from faecal samples collected on Islay. Dung invertebrates formed the majority of prey biomass in dune pasture and Tipulid larvae in mixed pasture but Aphodius larvae were scarce in the diet, whereas they had been a major component in the 1980s. There are management implications from the indication of a reduction in availability of preferred food.
Acknowledgements
Sincere thanks to Nick Wilkinson for data collection and Adrian Plant for help with taxonomic nomenclature of invertebrates. Thanks to the RSPB staff, farmers and landowners on Islay for allowing access to collect to samples.