As part of a larger study looking at the seasonal distribution and relative abundance of the southern house mosquito Culex quinquefasciatus in Kīpahulu Valley, Haleakalā National Park, terrestrial and stream surveys were conducted to determine the abundance of available larval mosquito habitat and the presence of mosquito larvae within the study area. Terrestrial larval mosquito habitat, like wallows and hapuu cavities, are largely dependent on the presence of feral pigs. Naturally occurring ground pools may be found in bogs and on less permeable, older soils. Stream-associated habitat is dependent more on rocky substrates and stream flow. First order, intermittent flowing streams found at higher elevations are more likely to provide larval habitat. At the higher elevation Palikea site only Aedes japonicus were found in stream pools but at the lower Delta site both Aedes japonicus and C. quinquefasciatus were found in stream pools. Culex quinquefasciatus larvae were also found in a ground pool with the remains of a dead pig at the Delta site.