Chick diets and food intake of nestling Common Guillemots Uria aalge: an inter-colony comparison
Hatchwell, B.J., Birkhead, T.R., Goodburn, S.F., Perrins, J.M. & Jones, S.E. (1992) Seabird 14:15-20
The feeding ecology of Common Guillemot chicks at two colonies, Skomer and Lundy Islands, situated 75km apart in the south Irish Sea was compared over two years. The diets of chicks varied significantly between colonies, with Lundy chicks fed on smaller prey than those on Skomer. However, chicks were fed more frequently on Lundy so the estimated daily energy intake was similar at both colonies. Parents on Lundy made shorter foraging trips than on Skomer. Chick diet and foraging ranges indicated little overlap in foraging areas. Fish fed to chicks were generally of higher quality than those used for display.
Prey size classes:
Foraging trip durations:
Annual Report of the Lundy Field Society 1985 36