HABITAT SELECTION AND FORAGING BEHAVIOR OF BREEDING CHOUGHS PYRRHOCORAX-PYRRHOCORAX L IN COUNTY DONEGAL

The chough Pyrrhocorax pyrrhocorax L. is largely restricted to areas o f low-input agricultural land in the UK and Ireland. In parts of their range their numbers have declined dramatically in recent years follow ing changes in land use. In this study, the relative importance of eig ht major habitat types to the foraging requirements of five breeding p airs of choughs in County Donegal was investigated. For each pair the area within a defined home range was classified according to habitat t ype, and both habitat use and foraging behaviour were monitored. Inver tebrate samples were also collected. Most pairs preferentially foraged in machair and maritime turf and avoided heather and improved pasture . Rough grass was also important, although to a lesser degree. Birds s pent longer actively feeding in machair where a greater range of inver tebrates were available. Our results are supportive of those obtained in previous studies and emphasise the importance of machair as a prima ry foraging habitat.