Billings Lake, North Stonington - 2013
Billings Map
Billings Lake is a 97.4-acre lake with a concrete dam. The majority of the lakeshore is forested with the exception of a camp on the northeastern side and some residential development on the western shore. The state maintains a boat ramp on the lake, and power boats are allowed. The lake has a mean depth of 14 feet and a maximum depth of 33 feet. There are several varying islands around the lake.

  The CAES IAPP vegetative survey was a resurvey from 2005. This year, 25 species were found compared to 18 species in 2005. The same two invasive species, variable-leaf watermilfoil (Myriophyllum heterophyllum) and fanwort (Cabomba caroliniana) were present in the lake.
Variable-Leaf watermilfoil is the most dominant species and was found growing in the entire lake in depths of up to 24 feet of water. It was the only plant growth that occurred on the small island in the middle of the lake. This was an increase since 2005 when the plant was mainly found in the southern portion of the lake with only a few patches around the shoreline. Variable-leaf watermilfoil was present on 76% of the transect points compared to 66% in 2005.
The other invasive species, fanwort, also increased since the previous survey. In 2005, the invasive plant was found in small patches in the coves and along the shoreline. This year, fanwort expanded to several patches throughout the lake with a rather large patch in the southern portion.
In the southern portion of the lake, purple bladderwort (Utricularia purpurea) expanded from the few small patches present in the previous survey to form one large patch. Yellow water lily (Nuphar variegata) and white water lily (Nymphea odorata) also increased in abundance in the southern point of the lake.
Species found in this year’s survey that were not recorded in 2005 include water starwort (Callitriche species), spineless hornwort (Ceratophyllum echinatum), primrose-willow (Ludwigia species), southern naiad (Najas guadalupensis), leafy pondweed (Potamogeton foliosus), and common bladderwort (Utricularia macrorhiza). In the southern portion of the lake, a large patch of common bladderwort was established along with a few small patches scattered around the shoreline. Water starwort was found in one small patch along the southwest shore near Transect 7 along with a larger patch of southern naiad. Spineless hornwort was present in one small patch on the eastern shore on Transect 1. Primrose-Willow and leafy pondweed occurred in widely scattered patches along the lakeshore.


Species recorded in our 2013 survey of Billings Lake.
Scientific Names
*Invasive Species
Leafy pondweed
Little floating heart
Robbins' pondweed
Spineless hornwort
Sevenangle pipewort
Spotted pondweed
Western waterweed
Snailseed pondweed
Variable-Leaf watermilfoil*
White water lily
Purple bladderwort
Southern naiad
Water starwort
Yellow water lily

Other Billings Lake Surveys: 2005