Woodside, California
UTC -7

civil twilight





Live stream: jasper_ridge_birdcast.mp3

Jasper Ridge Biological Preserve

Trevor Hebert

Latitude: +37.404001°
Longitude: -122.228781°

The microphone is located adjacent to lake, woodland and wetland habitats, capturing the sounds of a diverse range of birds, amphibians and insects. Jasper Ridge is near Stanford University's campus in the eastern foothills of the Santa Cruz Mountains.
The microphone site is adjacent to lake, woodland and wetland habitats. The audio streaming setup consists of an outdoor electret microphone with a low noise MOSFET pre-amplifier. A Barix Instreamer analog-to-digital encoder, sampling at 32 KHz, streams MPEG-1, audio layer III (MP3) over internet protocol (IP) to Locus Sonus. The Instreamer uplinks to the internet via a dual-radio A/N wireless access point, part of the Preserve's outdoor wireless mesh network. Solar panels and sealed gel batteries currently provide power.

Jasper Ridge Biological Preserve (JRBP) is located near Stanford University's campus in the eastern foothills of the Santa Cruz Mountains. The preserve encompasses remarkable geologic, topographic, and biotic diversity within its 483 hectares (1193 acres) and provides a natural laboratory for researchers from all over the world, educational experiences to students and docent-led visitors, and refuge to native plants and animals.

The careful management of the preserve's ecosystems in as natural a state as possible allows scientists to quantify changes observed in similar ecosystems affected by a range of human impacts. In addition to facilitating first-rate research, this highly accessible field station provides undergraduate educational experiences and plays an active role in educating the general public.

What you may hear
A couple of the most distinctive (and asked about) sounds are those of the pied-billed grebe ("jungle soundtrack bird") and the American bullfrog (repetitive groan/moan). This time of year red-winged blackbirds often dominate the chorus. Bewick's wren and Common yellowthroats are also typically heard. Listen for the occasional wild turkey and belted kingfisher.
At least one mountain lion has been heard "caterwauling" on this stream.

Birds here in April and May
  • Red-winged Blackbird
  • Common Yellowthroat
  • Bewick's Wren
  • Wrentit
  • Song Sparrow
  • Spotted Towhee
  • California Quail
  • Black-headed Grosbeak
  • Oak Titmouse
  • Chestnut-backed Chickadee
  • Wilson's Warbler
  • Orange-crowned Warbler
  • Pacific-slope Flycatcher
  • Warbling Vireo
  • Acorn Woodpecker
  • Ash-throated Flycatcher
  • White-breasted Nuthatch
  • Nuttall's Woodpecker
  • Dark-eyed Junco
  • Mourning Dove
  • Hutton's Vireo
  • Bushtit
  • House Finch
  • Steller's Jay
  • Anna's Hummingbird
  • Lesser Goldfinch
  • Pied-billed Grebe
  • Purple Finch
  • Swainson's Thrush
  • California Thrasher
  • American Coot
  • Western Wood-Pewee
  • Red-shafted Flicker
  • California Towhee
  • Western Scrub-Jay
  • American Goldfinch
  • American Robin
  • Black Phoebe
  • Red-shouldered Hawk
  • Wild Turkey
  • European Starling
  • Hairy Woodpecker
  • Killdeer
  • Audubon's Warbler
  • Blue-gray Gnatcatcher
  • Oregon Junco
  • American Crow
  • Belted Kingfisher
  • Common Raven
  • Golden-crowned Sparrow
  • Bullock's Oriole
  • Cedar Waxwing
  • Gadwall
  • Northern Flicker
  • Pacific Slope Flycatcher
  • White-brested Nuthatch
  • Yellow-rumped Warbler
  • Allen's Hummingbird
  • American Kestrel
  • Bald Eagle
  • Band-tailed Pigeon
  • Barn Swallow
  • Black-crowned Night-Heron
  • Black-throated Gray Warbler
  • Brewer's Blackbird
  • Broad-winged Hawk
  • Brown Creeper
  • Brown-headed Cowbird
  • Bufflehead
  • Canada Goose
  • Caspian Tern
  • Cliff Swallow
  • Cooper's Hawk
  • Double-crested Cormorant
  • Downy Woodpecker
  • Forster's Tern
  • Fox Sparrow
  • Great Blue Heron
  • Great Egret
  • Green Heron
  • Hermit Thrush
  • Hooded Merganser
  • Lawrence's Goldfinch
  • Lazuli Bunting
  • Mallard
  • Northern Rough-winged Swallow
  • Northern Shoveler
  • Osprey
  • Pileated Woodpecker
  • Purple Martin
  • Pygmy Nuthatch
  • Red-tailed Hawk
  • Ring-necked Duck
  • Ruddy Duck
  • Sharp-shinned Hawk
  • Spotted Sandpiper
  • Townsend's Warbler
  • Tree Swallow
  • Turkey Vulture
  • Unknown Accipiter
  • Vaux's Swift
  • Violet-green Swallow
  • Western Bluebird
  • Western Kingbird
  • White-crowned Sparrow
  • White-faced Ibis
  • White-tailed Kite
  • White-throated Swift
  • Wood Duck
  • Yellow Warbler