Rare, Threatened and Endangered Species

Threatened or Endangered Bird Species in Mountain Lakes
Species:  Great Blue Heron
Scientific Name:  Ardea herodias
State Status:  Heritage Program rank S2B (rare breeding species).
Status in Mountain Lakes:  Fairly common year-round; less so in severe winters when the Rockaway River freezes.  The nearest breeding colony is in Troy Meadows in Parsippany and Whippany.

Species:  Little Blue Heron
Scientific Name:  Egretta caerulea
State Status:  Heritage Program rank S2B (rare breeding species).
Status in Mountain Lakes:  Immature (white) Little Blue Herons have been seen several times in August and early September at Birchwood Lake.
Comments:  Breeds in heronries in south coastal New Jersey.

Species:  Bald Eagle
Scientific Name:  Haliaeetus leucocephalis
State Status:  Endangered; Heritage Program rank S1B, S2N.
Status in Mountain Lakes:  Uncommon to rare, year-round.
Comments:  One of the great endangered species success stories, the Bald Eagle, once down to one non-breeding pair in New Jersey, now is breeding statewide.  Most recently found nesting in Troy Meadows, in Parsippany.

Species:  Osprey
Scientific Name:  Pandion haliaetus
State Status:  Threatened; Heritage Program rank S2B.
Status in Mountain Lakes:  Uncommon in spring and fall migration, when it occasionally remains to fish for several days in the larger lakes.  Rare in summer.
Comments:  Slowly increasing as a breeding species in northern New Jersey.

Species:  Northern Goshawk
Scientific Name:  Accipiter gentilis
State Status:  Endangered; Heritage Program rank S1B
Status in Mountain Lakes:  Rare in fall migration; rare in winter.  Recently seen near Yorke Road off Intervale (Notestine 2008)
Comments:  This species has nested in nearby Rockaway Township in recent years.

Species:  Red-shouldered Hawk
Scientific Name:  Buteo lineatus
State Status:  Endangered; Heritage Program rank S1B
Status in Mountain Lakes:  Uncommon fall migrant; rare in winter and spring.
Comments:  Some suitable nesting habitat is present in Wilcox Park near the Tourne.

Species:  Broad-winged Hawk
Scientific Name:  Buteo platypterus
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Uncommon fall migrant; occasionally more numerous.  Suitable breeding habitat is present in the three larger wooded tracts present in the town.

Species:  Peregrine Falcon
Scientific Name:  Falco peregrinus
State Status:  Endangered; Heritage Program rank S1B.
Status in Mountain Lakes:  Rare fall migrant and winter transient; recently reported at the intersection of Yorke and Intervale Roads (Notestine 2008).

Species:  American Coot
Scientific Name:  Fulica americana
State Status:  Heritage Program rank S1B.
Status in Mountain Lakes:  Uncommon fall and spring migrant.

Species:  Spotted Sandpiper
Scientific Name:  Actitis macularius
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Uncommon in spring and fall on pond and lake shores.
Comments:  There is no suitable breeding habitat for this species in the Borough.

Species:  Northern Saw-Whet Owl
Scientific Name:  Aegolius funereus
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes: Rare late fall and winter visitor.  Seen in Wilcox park in 1998.  A dead Saw-whet Owl was found along the Boulevard in late fall, 1986.

Species:  Common Nighthawk
Scientific Name:  Chordeiles minor
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Uncommon late summer migrant; rare spring migrant.

Species:  Blue-headed Vireo
Scientific Name:  Vireo solitarius
State Status:  S3B
Status in Mountain Lakes:  Fairly common in spring and fall migration.  Breeds in Rockaway Township.

Species:  Pied-billed Grebe
Scientific Name:  Podilymbus podiceps
State Status:  Endangered as a breeder.
Status in Mountain Lakes:  Occasional fall and spring migrant; rare in winter.
Comments:  There is no suitable breeding habitat for this species in the Borough.

Species:  Black-crowned Night Heron
Scientific Name:  Nycticorax nycticorax
State Status:  Threatened.
Status in Mountain Lakes:  Rare in spring and summer around Birchwood Lake.
Comments:  Breeds in colonies along the coast and in the Hackensack Meadows.

Species:  Yellow-crowned Night Heron
Scientific Name:  Nyctanassa violacea
State Status:  Threatened
Status in Mountain Lakes:  Rare.  Seen once at Crystal Lake.
Comments:  Breeds in south coastal N.J. and at few colonies in Bergen County and the Hackensack Meadows.

Species:  Nashville Warbler
Scientific Name:  Vermivora ruficapilla
State Status:  Heritage Program rank S1B.
Status in Mountain Lakes:  Uncommon spring and fall migrant.

Species:  Northern Parula
Scientific Name:  Parula americana
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Uncommon to common spring migrant; uncommon fall migrant.

Species:  Magnolia Warbler
Scientific Name:  Dendroica magnolia
State Status:  Heritage Program rank S1B.
Status in Mountain Lakes:  Fairly common spring and fall migrant.

Species:  Black-throated Blue Warbler
Scientific Name:  Dendroica caerulescens
State Status:  Heritage Program rank S?B
Status in Mountain Lakes:  Uncommon spring and fall migrant.

Species:  Cerulean Warbler
Scientific Name:  Dendroica cerulea
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Very rare spring migrant; seen twice in late April at Birchwood Lake.

Species:  Canada Warbler
Scientific Name:  Wilsonia canadensis
State Status:  Heritage Program rank S3B.
Status in Mountain Lakes:  Uncommon spring and fall migrant.

Species:  Dark-eyed Junco
Scientific Name:  Junco hyemalis
State Status:  Heritage Program S1B.
Status in Mountain Lakes:  Common spring and fall migrant and winter resident.

Species:  Pine Siskin
Scientific Name:  Carduelis lawrencei
State Status:  Heritage Program rank SPB.
Status in Mountain Lakes:  Uncommon to rare in fall and winter.

Infrequent Migrant Bird Species in Mountain Lakes
Birds on this list sometimes or rarely migrate through Mountain Lakes.

Species:  Snow Goose
Scientific Name:  Chen caerulenscens
Status in Mountain Lakes:  Uncommon fall migrant in flocks overhead; injured individuals have been seen occasionally over the years with Canada Geese.

Species:  Brant
Scientific Name:  Branta bernica
Status in Mountain Lakes:  Rare.  Seen once in the fall of 2006 on Mountain Lake.
Comments:  An Arctic species which winters along the N.N. coast; rarely seen on inland lakes.

Species:  Wood Duck
Scientific Name:  Aix sponsa
Status in Mountain Lakes:  Uncommon transient and breeding species.
Comments:  Usually nests in tree cavities away from the water.

Species:  Eurasian Wigeon
Scientific Name:  Anas penelope
Status in Mountain Lakes:  Very rare.  A drake was observed on Mountain Lake from October 29 to November 8, 1977.

Species:  Northern Pintail
Scientific Name:  Anas acuta
Status in Mountain Lakes:  Uncommon spring and fall migrant; rare in winter.

Species:  Blue-winged Teal
Scientific Name: Anas discors
Status in Mountain Lakes:  Rare spring migrant.

Species:  Northern Shoveler
Scientific Name:  Anas  clypeata
Status in Mountain Lakes:  Uncommon spring and fall migrant; occasional in winter.
Comments:  Has increased in recent decades.

Species:  Green-winged Teal
Scientific Name:  Anas caroliniensis
Status in Mountain Lakes:  Uncommon spring and fall migrant; occasional in winter.

Species:  Canvasback
Scientific Name:  Athyya valisineria
Status in Mountain Lakes:  Uncommon to rare fall and spring migrant; rare in winter.
Comments:  A declining species.

Species:  Redhead
Scientific Name:  Aythya americana
Status in Mountain Lakes:  Rare fall and spring migrant.
Comments:  Redhead numbers have been increasing in the last few years.

Species:  Lesser Scaup
Scientific Name:  Athya affinis
Status in Mountain Lakes:  Uncommon spring and fall migrant.

Species:  Greater Scaup
Scientific Name:  Athya marila
Status in Mountain Lakes:  Uncommon to rare spring and fall migrant.

Species:  Common Goldeneye
Scientific Name:  Bucephala clangula
Status in Mountain Lakes:  Rare spring and fall migrant.

Species:  Red-breasted Merganser
Scientific Name:  Mergus serrator
Status in Mountain Lakes:  Rare fall migrant.
Comments:  Seldom occurs on inland lakes during migration.

Species:  Red-throated Loon.
Scientific Name:  Gavia stellata
Status in Mountain Lakes:  Rare late fall migrant on Mountain Lake.

Species:  Common Loon
Scientific Name:  Gavia immer
Status in Mountain Lakes:  Uncommon to rare fall migrant in the larger lakes.

Species:  Horned Grebe
Scientific Name:  Podiceps auritus
Status in Mountain Lakes:  Rare fall migrant, uncommon spring migrant.

Species:  Great Egret
Scientific Name:  Ardea alba
Status in Mountain Lakes:  Uncommon in summer and early fall around ponds and lakes.
Comments:  Breeds in south coastal New Jersey.

Species:  Snowy Egret
Scientific Name:  Egretta thula
Status in Mountain Lakes:  Rare in late summer at Birchwood Lake.
Comments:  Breeds in south coastal New Jersey.

Species:  Green Heron
Scientific Name:  Butoides virescens
Status in Mountain Lakes:  Uncommon in late spring and summer.  Possible breeder.

Species:  Black Vulture
Scientific Name:  Coragyps atratus
Status in Mountain Lakes:  Uncommon in spring, summer, and fall; rare in winter.
Comments:  Known to breed in rocky areas in Boonton Township and Parsippany.

Species:  Golden Eagle.
Scientific Name:  Aquila chrysaetos
Status in Mountain Lakes:  Very rare.  Seen flying over the Boulevard in December, 2007.

Species:  American Kestrel
Scientific Name:  Falco sparvensis
Status in Mountain Lakes:  Uncommon fall migrant; absent other seasons.
Comments:  This small falcon has suffered a large decline in numbers in recent decades.
Species:  Merlin
Scientific Name:  Falco columbarius
Status in Mountain Lakes:  Uncommon to rare in fall migration; absent other seasons.

Species:  Killdeer
Scientific Name:  Charadrius wilsonia
Status in Mountain Lakes:  Occasional in large parking lots and athletic fields during fall and spring migration.

Species:  Greater Yellowlegs
Scientific Name:  Tringa melanoleuca
Status in Mountain Lakes:  Uncommon spring and fall migrant on lake and pond shores.

Species:  Lesser Yellowlegs
Scientific Name:  Tringa flavipes
Status in Mountain Lakes:  Uncommon to rare spring and fall migrant on lake and pond shores.

Species:  Solitary Sandpiper
Scientific Name:  Tringa solitaria
Status in Mountain Lakes:  Uncommon spring and fall migrant on pond and lake shores.

Species:  Least Sandpiper
Scientific Name:  Calidris minutilla
Status in Mountain Lakes:  Uncommon migrant in spring and fall on muddy pond and lake shores.

Species:  American Woodcock
Scientific Name:  Scolopax minor
Status in Mountain Lakes:  Seen occasionally during spring and fall migration in Wilcox Park.  Possible nesting species
Comments:  Suitable breeding habitat is present nearby in the fields to the south of Saint Claire’s Hospital in Denville.

Species:  Herring Gull
Scientific Name:  Larus argentatus
Status in Mountain Lakes:  Occasional in fall, winter, and spring on area lakes and parking lots.

Species:  Iceland Gull
Scientific Name:  Larus glaucoides
Status in Mountain Lakes:  Rare; seen once on Birchwood Lake in January, 1987.

 

Species:  Great Black-backed Gull

Scientific Name:  Larus marinus

Status in Mountain Lakes: Uncommon to rare in fall, winter, and spring on area lakes.

 

Species:  Lesser Black-backed Gull

Scientific Name:  Larus fuscus

Status in Mountain Lakes:  Rare; seen once on Mountain Lake in December, 2002..

 

Species:  Yellow-billed Cuckoo

Scientific Name:  Coccyzus americanus

Status in Mountain Lakes:  Uncommon spring and fall migrant.

Comments:  May occasionally breed in the Borough.

 

Species:  Black-billed Cuckoo

Scientific Name:  Coccyzus erythropthalmus

Status in Mountain Lakes:  Uncommon spring and fall migrant.

Comments:  Possible breeding species.

 

Species:  Ruby-throated Hummingbird

Scientific Name:  Archilochus colubris

Status in Mountain Lakes:  Uncommon spring and fall migrant.  Possible breeder in the Borough.

 

Species:  Belted Kingfisher

Scientific Name:  Ceryle alcyon

Status in Mountain Lakes:  Uncommon spring, summer, and fall around lakes and ponds; rare in winter.  Breeds adjacent to the Borough along the Rockaway River in Denville and Boonton Township.

 

Species:  Yellow-bellied Sapsucker

Scientific Name:  Sphyrapicus thyroideus

Status in Mountain Lakes:  Uncommon spring and fall migrant; rare in winter.

 

Species:  Least Flycatcher

Scientific Name:  Empidonax minimus

Status in Mountain Lakes:  Uncommon spring migrant.

 

Species:  Empidonax flycatcher species

Scientific Name:  Empidonax spp.

Status in Mountain Lakes:  Uncommon spring and fall migrants.

 

Species:  Yellow-throated Vireo

Scientific Name:  Vireo flavifrons

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Philadelphia Vireo

Scientific Name:  Vireo philadelphicus

Status in Mountain Lakes: Rare early September migrant along woodland edges.

 

Species:  Common Raven

Scientific Name:  Corvus corax

Status in Mountain Lakes:  Rare, but increasing.  Seen occasionally in Wilcox Park and around Birchwood Lake.Comments:  Now breeds in nearby Rockaway and Boonton Townships.

Species:  Bank Swallow

Scientific Name:  Riparia riparia

Status in Mountain Lakes:  Uncommon spring and summer transient.

 

Species:  Red-breasted Nuthatch

Scientific Name:  Sitta canadensis

Status in Mountain Lakes:  Uncommon fall and winter visitor; rare migrant in spring.

 

Species:  Brown Creeper

Scientific Name:  Certhia americana

Status in Mountain Lakes:  Uncommon spring and fall migrant; uncommon winter resident.

 

Species:  Blue-gray Gnatcatcher

Scientific Name:  Polioptila caerulea

Status in Mountain Lakes:  Rare breeder in spring and summer.

 

Species:  Swainson’s Thrush

Scientific Name:  Catharus ustulatus

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Brown Thrasher

Scientific Name:  Toxostoma longirostre

Status in Mountain Lakes:  Rare in spring, summer, and early fall; possible breeder.

 

Species:  Blue-winged Warbler

Scientific Name:  Vermivora pinus

Status in Mountain Lakes:  Rare spring and fall migrant.

 

Species:  Tennessee Warbler

Scientific Name:  Vermivora peregrina

Status in Mountain Lakes:  Rare spring and fall migrant.

 

Species:  Chestnut-sided Warbler

Scientific Name:  Dendroica pennsylvanica

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Cape May Warbler

Scientific Name:  Dendroica tigrina

Status in Mountain Lakes:  Rare spring and fall migrant.

 

.Species:  Blackburnian Warbler

Scientific Name:  Dendroica fusca

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Pine Warbler

Scientific Name:  Dendroica pinus

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Prairie Warbler

Scientific Name:  Dendroica discolor

Status in Mountain Lakes:  Uncommon spring and fall migrant.

Species:  Palm Warbler

Scientific Name:  Dendroica palmatum

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Yellow-Throated Warbler

Scientific Name:  Dendroica dominica

Status in Mountain Lakes:  Very rare spring migrant; seen twice in the YMCA parking lot in May 1983 and late April 2004.

 

Species:  Bay-Breasted Warbler

Scientific Name:  Dendroica castanea

Status in Mountain Lakes:  Rare spring and fall migrant.

 

Species:  Louisiana Waterthrush

Scientific Name:  Seiurus motacilla

Status in Mountain Lakes:  Rare spring and July migrant; has bred in past years along Troy Brook.

 

Species:  Northern Waterthrush

Scientific Name:  Seiurus noveboracensis

Status in Mountain Lakes:  Uncommon spring migrant; rare fall migrant.

 

Species:  Wilson’s Warbler

Scientific Name:  Wilsonia pusilla

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Hooded Warbler

Scientific Name:  Wilsonia citrina

Status in Mountain Lakes:  Rare spring and fall migrant.

 

Species:  Swamp Sparrow

Scientific Name:  Melospiza georgiana

Status in Mountain Lakes:  Uncommon fall migrant and winter resident.

 

Species:  Fox Sparrow

Scientific Name:  Passerella iliaca

Status in Mountain Lakes:  Uncommon spring and fall migrant; rare in winter.

 

Species:  White-crowned Sparrow

Scientific Name:  Zonotrichia leucophrys

Status in Mountain Lakes:  Rare spring and fall migrant.

 

Species:  Rose-breasted Grosbeak

Scientific Name:  Pheucticus ludovicianus

Status in Mountain Lakes:  Uncommon spring and fall migrant.

 

Species:  Rusty Blackbird

Scientific Name:  Euphagus carolinus

Status in Mountain Lakes:  Rare migrant spring and fall migrant; rare in winter.

 

Species:   Orchard Oriole

Scientific Name:  Icterus spurius

Status in Mountain Lakes:  Rare migrant in spring and summer.

 

Species:  Purple Finch

Scientific Name:  Carpodacus purpureus

Status in Mountain Lakes:  Uncommon migrant in spring and fall; sporadically rare to uncommon in winter.

 

Species:  Evening Grosbeak

Scientific Name:  Cocothruaustes vespertinus

Status in Mountain Lakes:  Rare.  A few birds were seen flying over Wilcox Park on December 19, 2008.

 

Species:  Worm-eating Warbler

Scientific Name:  Helmitheros vermivorum

Status in Mountain Lakes:  Rare spring migrant.  Breeds in Wilcox Park and the adjacent Tourne county park.

 

Species:  Ovenbird

Scientific Name:  Seiurus aurocapilla

Status in Mountain Lakes:  Uncommon breeding species in Wilcox and Frederick Parks, and in woods around Tower Hill.

 

Species:  Scarlet Tanager

Scientific Name:  Piranga olivacea

Status in Mountain Lakes:  Uncommon spring and summer breeding species in wooded tracts.

 

Species:  Eastern Towhee

Scientific Name:  Pipilo erythrophthalmus

Status in Mountain Lakes:  Uncommon spring, summer, and early fall resident; rare in winter.

 

Species:  American Tree Sparrow

Scientific Name:  Spizella arborea

Status in Mountain Lakes:  Uncommon late fall and winter resident. 

Possible Bird Species in Mountain Lakes

Species:  Ruffed Grouse

Scientific Name:  Bonasa umbellus

Status in Mountain Lakes:  Possible

Comments:  Formerly occurred in adjacent Boonton Township, Denville, and Parsippany.  Ruffed Grouse is becoming one of the rarer breeding species in the state, and it is absent over most if its former range.  Grouse prefer forested areas with a varied dense understory of tree saplings and shrubs, and it is thought that overbrowsing by deer have eliminated this habitat in many areas of the state.