The Status and Distribution of the River Otter (Lontra canadensis) on Long Island, New York Otter with Golden Shiner at St.John’s Pond, Oyster Bay, December 2008. Robert Sendlein Photo. Submitted by: Mike Bottini, Wildlife Biologist 631-267-5228
[email protected] March 1, 2009 ABSTRACT Historically, river otters (Lontra canadensis) were found on many of Long Island’s waterways: fresh and salt water ponds, creeks, embayments on the island’s north and south shores, as well as the Peconic River and Estuary on the island’s eastern end. In the 1800s, several factors (unregulated trapping, water pollution, and habitat loss) caused a dramatic decline in otter populations throughout its range in North America and local extirpations in many areas, including Long Island. Conservation laws enacted in the early 1900s enabled remnant otter populations to expand and re-colonize former habitat. Little is known about the current status and distribution of river otters on Long Island, a region that poses formidable challenges for the natural re-colonization of extirpated wildlife because of its geographic location and development patterns. An informational flyer was distributed to natural resource and park staff, local media, and the general public to solicit data on otter sightings and roadkills. This data, along with historical information and knowledge of otter habits, was used to map 144 potential otter latrine sites on Long Island. Each potential latrine site was surveyed during the winter (January through March) of 2008. Twenty-seven sites were documented as active otter latrine sites, with one cluster of sites near the western end of the island exhibiting evidence of successful breeding.