Wild tree swallows perched on an artificial nest box at Cosumnes River Preserve, in California’s Central Valley.
Images
Wild tree swallows perched on an artificial nest box at Cosumnes River Preserve, in California’s Central Valley.
Figure 5. MKDEs may help better identify threats to species.
Figure 5. MKDEs may help better identify threats to species.
Jeff Tracey of USGS (left) and James Sheppard of San Diego Zoo Institute for Conservation Research visit the San Diego Supercomputer Center, which provides advanced user support and expertise for the Extreme Science and Engineering Discovery Environment (XSEDE) program supported by the National Science Foundation. (Image credit: Bob Sinkovits/SDSC)
Jeff Tracey of USGS (left) and James Sheppard of San Diego Zoo Institute for Conservation Research visit the San Diego Supercomputer Center, which provides advanced user support and expertise for the Extreme Science and Engineering Discovery Environment (XSEDE) program supported by the National Science Foundation. (Image credit: Bob Sinkovits/SDSC)
Figure 7. Examples of a 3D movement-based kernel density estimator (MKDE) for a dugong in a marine environment.
Figure 7. Examples of a 3D movement-based kernel density estimator (MKDE) for a dugong in a marine environment.
A male (light colored) and a female (dark colored) Yosemite toads mating.
A male (light colored) and a female (dark colored) Yosemite toads mating.
Tidepool scenes of vibrantly colored sea stars could become a rarity as the Sea Star Wasting Disease spreads.
Tidepool scenes of vibrantly colored sea stars could become a rarity as the Sea Star Wasting Disease spreads.
Spider monkeys (Ateles geoffroyi) are omnivores, often feeding on fruits and insects.
Spider monkeys (Ateles geoffroyi) are omnivores, often feeding on fruits and insects.
USGS technician weighing a Yosemite toad in the field.
USGS technician weighing a Yosemite toad in the field.
San Francisco Bay — which has already lost the majority of its marsh habitat since the 19th Century — could lose even more marshes by the year 2100 due to sea level rise, according to a new USGS report.
San Francisco Bay — which has already lost the majority of its marsh habitat since the 19th Century — could lose even more marshes by the year 2100 due to sea level rise, according to a new USGS report.
A San Francisco gartersnake (Thamnophis sirtalis tetrataenia) stares down the camera lens.
A San Francisco gartersnake (Thamnophis sirtalis tetrataenia) stares down the camera lens.
Photo of the blooms of the Barstow woolly flower (Eriophyllum mohavense).
Photo of the blooms of the Barstow woolly flower (Eriophyllum mohavense).
Clark's grebe sitting on a nest at Thermalito Afterbay, California.
Clark's grebe sitting on a nest at Thermalito Afterbay, California.
The flower of the thistle sage, Salvia carduacea.
The flower of the thistle sage, Salvia carduacea.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
A mountain bluebird eats a giant mistletoe berry in an ash tree in Sedona, Arizona (Oak Creek). These bluebirds, and many other types of birds, rely on mistletoe berries for sustenance. As a result, they also help distribute the mistletoe seeds.
Taken at Palmyra National Wildlife Refuge
Taken at Palmyra National Wildlife Refuge
The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume. This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river. Two large dams on the Elwha River were incrementally r
The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume. This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river. Two large dams on the Elwha River were incrementally r
The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume. This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river. Two large dams on the Elwha River are being incrementally r
The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume. This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river. Two large dams on the Elwha River are being incrementally r
A beard lichen (Usnea sp.) grows on an Island Oak on Santa Rosa Island and helps to create the fog precipitation.
A beard lichen (Usnea sp.) grows on an Island Oak on Santa Rosa Island and helps to create the fog precipitation.
Field photo of shovel-nosed snake (Chionactis occipitalis). Credit Zach Cava/USGS.
Field photo of shovel-nosed snake (Chionactis occipitalis). Credit Zach Cava/USGS.