Summary

  • Status in VT: Increased by 400% (0 to 4 blocks). Greatest increase in Champlain Valley. Population rose from a single nest during first Atlas to over 4,000 nesting pairs at beginning of second Atlas.
  • Data from other research: No additional data for VT.
  • Conservation status: State rank S2B
  • Other atlases: NY: 714%; PA: 2133%
  • VT’s role in North American range: VT is within the core of the range.
  • Causes of change since first Atlas:Immigration from populations in core of range that have presumably recovered from past human persecution and pesticide exposure. Increases in prey availability and overwinter survival may have also contributed.
  • Management/Monitoring recommendations: Continue population control measures on Young Island in Lake Champlain including; egg oiling, shooting cormorants attempting to nest.

First Vermont Breeding Bird Atlas (1976-1981)

Species Account

Second Vermont Breeding Bird Atlas (2003 – 2007)

Double-crested Cormorant Map 1 Double-crested Cormorant Table 1 Double-crested Cormorant Table 2

Change in Distribution

mapkeyDouble-crested Cormorant Map 2 Double-crested Cormorant Table 3

Links

Vermont eBird

Encyclopedia of Life

All About Birds