Wetland features that influence occupancy by the endangered Hawaiian duck
- Author:
-
Uyehara, Kimberly, Englis, Andrew Jr., Dugger, Bruce D.
- Title:
- Wetland features that influence occupancy by the endangered Hawaiian duck
- Periodical:
- The Wilson Journal of Ornithology
- Year:
- 2008
- Volume:
- 120
- Pages:
- p.311-319
- Subject:
-
Koloa maoli
Mauna Kea
Kohala
- Summary:
- This document describes the Hawaiian Duck or Koloa maoli, (Anas wyvilliana), a monochromatic, non-migratory and endangered species that is allied with the North American Mallard (A. platyrhynchos) complex. The Koloa is the only endemic duck species to remain in the Hawaiian islands of more than eleven members of Anatidae reported in the fossil record. While the Koloa use diverse habitats that range from sea level to the 3,000 meter elevation, (that includes palustrine emergent, riverine, but rarely estuarine habitats), threats to the Koloa persistence include depredation by introduced predators, habitat loss, and hybridization with feral Mallards. As a result, this study was designed to characterize the patterns of wetland use by the Koloa, to compare the characteristics of the used and unused wetlands, and to examine how site and landscape characteristics influence wetland use by the Koloa. This was done in an effort to guide future habitat enhancement projects. This study was done on the windward or northeast slopes of the Kohala and Mauna Kea mountains where the majority of mid-elevation depressional wetlands, agricultural ponds, and perennial streams occur on the island of Hawaii and where older volcanic substrates prevent perculation.
- Label:
- Birds - General
- URL:
- http://cletus.uhh.hawaii.edu:2074/10.1676/06-174.1
- Date:
- June 2008
- Collection:
- Periodicals