Translator Disclaimer
1 March 1999 Diet and survival of capercaillie Tetrao urogallus chicks in Scotland
Author Affiliations +
Abstract

The diet of young capercaillie Tetrao urogallus chicks in Scotland was assessed from analysis of their faeces, collected at the roost sites of broods with radio-marked mothers. Lepidoptera larvae were their main invertebrate food and bilberry Vaccinium myrtillus their main plant food. The concentration of larval remains in the chicks' droppings was correlated with the abundance of larvae found by sweep netting in nearby vegetation. Broods of chicks with the greatest concentration of larval remains in their droppings survived best. Sweep netting for larvae in a semi-natural pine forest in June 1991–1996 showed that larval size, abundance and timing differed among years, and that the sites with the most larvae also differed from year to year. In the same forest, we estimated capercaillie breeding success from hens and chicks found during dog counts. The average number of young per hen in July was correlated with the size, rather than the abundance, of larvae in mid June.

© WILDLIFE BIOLOGY
Nicholas Picozzi, Robert Moss, and Kenneth Kortland "Diet and survival of capercaillie Tetrao urogallus chicks in Scotland," Wildlife Biology 5(1), 11-23, (1 March 1999). https://doi.org/10.2981/wlb.1999.004
Received: 17 November 1997; Accepted: 18 June 1998; Published: 1 March 1999
JOURNAL ARTICLE
13 PAGES


SHARE
ARTICLE IMPACT
Back to Top