Diet composition and food consumption of the grey heron (Ardea cinerea) from breeding colonies in northern Poland

@article{Jakubas2005DietCA,
  title={Diet composition and food consumption of the grey heron (Ardea cinerea) from breeding colonies in northern Poland},
  author={Dariusz Jakubas and Agnieszka Mioduszewska},
  journal={European Journal of Wildlife Research},
  year={2005},
  volume={51},
  pages={191-198}
}
The diet of the grey heron (Ardea cinerea) was investigated in three colonies in northern Poland (Mosty, Kiersity and Kąty Rybackie) varying in size, habitat type and composition of feeding areas used by birds. The diet was assessed during the breeding season on the base of pellets and regurgitated food. Pellets from all studied colonies consisted mainly of mammal hair (almost 100% of samples), bone remains (20–24%) and invertebrate remains (26–51%, mainly water beetle, Dytiscus marginalis… 

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In the studied colonies, the number of feeding visits was the most important factor affecting breeding success and chick mortality significantly decreased with increasing numbers of feeding visit per nest.

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