Differential use of habitat aids local coexistence of three species of wrens (Maluridae) and the White-browed ScrubwrenSericornis frontalis: Pardalotidae in Myall Lakes National Park

Abstract

Four species of small insectivorous birds, the Superb Fairy-wren Malurus cyaneus, Variegated Fairy-wren M. lamberti, Southern Emu-wren Stipiturus malachurus and White-browed Scrubwren Sericornis frontalis have similar foraging methods which has often led to them being grouped into the same foraging guild. These four species occur in sympatry at Myall Lakes National Park, 300 km north of Sydney. Discriminant function analysis was used to test for any differential use of habitat between the four species. Malurus cyaneus was observed more often in open grassland habitats which is likely to be their preferred habitat. Stipiturus malachurus were more common in reedy (Baumea sp.) areas where their unique foraging behaviour may increase foraging efficiency. The remaining two species had some differences in habitat use, but foraged at significantly different heights in the vegetation.