Evidence of an Increasing Hooded Merganser Population in Massachusetts

摘要

The number of Hooded Merganser (Lophodytes cucullatus) broods hatching in nest hous- es on 53 study areas in Massachusetts increased by 289/100 from 1979-1983 to 1994-1998 and the number of areas used increased from 9 of 53 in 1979 to 26 of 53 by 1998. The number of Hooded Mergansers count- ed on 21 Massachusetts Christmas Bird Count circles from 1979-1983 to 1994-1998 increased by 225/100. The increasing trend lines did not match, suggesting Different populations. This appears to support reports Of increasing Hooded Merganser populations by other Northeastern state waterfowl biologists.