Pallid sturgeon free embryos preserved at 3 days post hatch. Free embryos at this stage have only a rudimentary mouth, their pectoral fins are only beginning to develop, and they rely on a large yolk sac for food.
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Pallid Sturgeon 3 Days Post Hatch
Pallid sturgeon free embryos preserved at 3 days post hatch. Free embryos at this stage have only a rudimentary mouth, their pectoral fins are only beginning to develop, and they rely on a large yolk sac for food.
Native Bee Pollinating a Prickly Pear
A native bee pollinates a prickly pear cactus in Colorado. Credit: Mark Vandever, USGS.
A native bee pollinates a prickly pear cactus in Colorado. Credit: Mark Vandever, USGS.
Sonar Scanning the Yellowstone River
CSRP Scientists scan the Yellowstone River where pallid sturgeon were grouped in a spawning aggregation.
CSRP Scientists scan the Yellowstone River where pallid sturgeon were grouped in a spawning aggregation.
Researchers Prepare to Release a Captured Pallid Sturgeon
Researchers Prepare to Release a Captured Pallid SturgeonResearchers prepare to release a captured female pallid sturgeon after a post-spawn analysis.
Researchers Prepare to Release a Captured Pallid Sturgeon
Researchers Prepare to Release a Captured Pallid SturgeonResearchers prepare to release a captured female pallid sturgeon after a post-spawn analysis.
Recording Silver Carp Response to Sound
University of Minnesota-Duluth researcher Kelsie Murchy records silver carp responses to sound at the USGS Upper Midwest Environmental Sciences Center.
University of Minnesota-Duluth researcher Kelsie Murchy records silver carp responses to sound at the USGS Upper Midwest Environmental Sciences Center.
Sediment Sampling the Yellowstone River
USGS hydrologists prepare to deploy a BM-54 bed-material sampler on the Yellowstone River.
USGS hydrologists prepare to deploy a BM-54 bed-material sampler on the Yellowstone River.
Banded adult Piping Plover on river mile 1334 of the Missouri River, North Dakota
Banded adult Piping Plover on river mile 1334 of the Missouri River, North DakotaBanded adult Piping Plover on river mile 1334 of the Missouri River, North Dakota
Banded adult Piping Plover on river mile 1334 of the Missouri River, North Dakota
Banded adult Piping Plover on river mile 1334 of the Missouri River, North DakotaBanded adult Piping Plover on river mile 1334 of the Missouri River, North Dakota
Polar Bear at Rest
Polar bear laying down to dry after a swim in the Chukchi sea.
Polar bear laying down to dry after a swim in the Chukchi sea.
Polar Bear Drying Off
Polar bear drying off after a swim in the Chukchi sea.
Polar bear drying off after a swim in the Chukchi sea.
Swimming Polar Bear
Polar bears spend much of their lives in and around water, and they are well adapted for swimming.
Polar bears spend much of their lives in and around water, and they are well adapted for swimming.
Polar Bear Exits the Ocean
Polar bear pulling himself out of the ocean onto the sea ice.
Polar bear pulling himself out of the ocean onto the sea ice.
Polar Bear Exits the Ocean
Polar bear pulling himself out of the ocean onto the sea ice.
Polar bear pulling himself out of the ocean onto the sea ice.
Retrieving Incubators
Bruce Manny and Tom Edsall retrieve incubators containing lake trout embryos from spawning grounds in the Fox Island Refuge in northern Lake Michigan.
By
Bruce Manny and Tom Edsall retrieve incubators containing lake trout embryos from spawning grounds in the Fox Island Refuge in northern Lake Michigan.
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Deer Tick Nymphs
Ticks spread the widest variety of diseases that are harmful to humans, including Lyme disease. This is an image of blacklegged tick nymphs, or immature deer ticks.
Ticks spread the widest variety of diseases that are harmful to humans, including Lyme disease. This is an image of blacklegged tick nymphs, or immature deer ticks.
Yosemite Toads Mating
A male (light colored) and a female (dark colored) Yosemite toads mating.
A male (light colored) and a female (dark colored) Yosemite toads mating.
Measuring Elevation in a Threatened Wetland, CA
A USGS employee uses an instrument to measure the elevation at Seal Beach National Wildlife Refuge in southern California, in contribution to a study on sea level rise's impact on coastal wetlands.
A USGS employee uses an instrument to measure the elevation at Seal Beach National Wildlife Refuge in southern California, in contribution to a study on sea level rise's impact on coastal wetlands.
Bee Trap in Grassland
A blue bee trap is located in a Colorado grassland. These are used to collect bee specimens for lab study. Credit: Mark Vandever, USGS.
A blue bee trap is located in a Colorado grassland. These are used to collect bee specimens for lab study. Credit: Mark Vandever, USGS.
Tegu
Tegu preying in on the crocodile nest.
Tegu preying in on the crocodile nest.
Tegu
Tegu preying in on the crocodile nest.
Tegu preying in on the crocodile nest.
Adult Piping Plover showing broken-wing display to lure predator away from nest.
Adult Piping Plover showing broken-wing display to lure predator away from nest.Adult Piping Plover showing broken-wing display to lure predator away from nest.
Adult Piping Plover showing broken-wing display to lure predator away from nest.
Adult Piping Plover showing broken-wing display to lure predator away from nest.Adult Piping Plover showing broken-wing display to lure predator away from nest.
Water Released Across the U.S. - Mexico Border Brings Life to the Colorado River
Water Released Across the U.S. - Mexico Border Brings Life to the Colorado RiverNative seedlings along the Colorado River consisting of a mix of mostly Baccharis, tamarisk, and a couple of cottonwoods.A peso coin is included for scale.
Water Released Across the U.S. - Mexico Border Brings Life to the Colorado River
Water Released Across the U.S. - Mexico Border Brings Life to the Colorado RiverNative seedlings along the Colorado River consisting of a mix of mostly Baccharis, tamarisk, and a couple of cottonwoods.A peso coin is included for scale.