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Threatened and Endangered Species

Filter Total Items: 11

Bird Habitat Needs in the Mississippi Alluvial Valley

Historically the Mississippi Alluvial Valley (MAV) was predominantly bottomland hardwood forest and most birds of conservation concern depend on bottomland hardwood forest. Past conservation planning has focused on habitat objectives with presumption that bird population goals would be met by habitat provision.
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Bird Habitat Needs in the Mississippi Alluvial Valley

Historically the Mississippi Alluvial Valley (MAV) was predominantly bottomland hardwood forest and most birds of conservation concern depend on bottomland hardwood forest. Past conservation planning has focused on habitat objectives with presumption that bird population goals would be met by habitat provision.
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Pre-listing Science Support in the Northeast

The background information required to support listing decisions is not always current or available, and additional information or tools to model potential future condition can greatly improve the confidence in Species Status Assessments. We are working closely with multiple partners to provide updated information, model potential outcomes, and identify key uncertainties relevant to amphibian and...
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Pre-listing Science Support in the Northeast

The background information required to support listing decisions is not always current or available, and additional information or tools to model potential future condition can greatly improve the confidence in Species Status Assessments. We are working closely with multiple partners to provide updated information, model potential outcomes, and identify key uncertainties relevant to amphibian and...
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Sustainably Designed Trails: Recent Recreation Ecology Findings on Design Factors Affecting Soil Loss

An estimated 146 million Americans participated in more than 10.9 billion outdoor recreation activities in 2017. Virtually all protected natural areas have recreational trails as an essential infrastructure component to accommodate these outdoor recreation activities and visitor access, supporting a diverse array of opportunities and experiences that include nature study, hiking, camping, mountain...
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Sustainably Designed Trails: Recent Recreation Ecology Findings on Design Factors Affecting Soil Loss

An estimated 146 million Americans participated in more than 10.9 billion outdoor recreation activities in 2017. Virtually all protected natural areas have recreational trails as an essential infrastructure component to accommodate these outdoor recreation activities and visitor access, supporting a diverse array of opportunities and experiences that include nature study, hiking, camping, mountain...
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Assessing Endangered Marsh Rabbit and Woodrat Habitat use and Predator Population Dynamics

Feral and free-ranging domestic cats (Felis catus) have strong negative effects on wildlife, particularly in island ecosystems such as the Florida Keys. We deployed camera traps to study free-ranging cats in National Wildlife Refuges and state parks on Big Pine Key and Key Largo and used spatial models to estimate cat population dynamics and stable isotope analyses to examine cat diets. Top models...
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Assessing Endangered Marsh Rabbit and Woodrat Habitat use and Predator Population Dynamics

Feral and free-ranging domestic cats (Felis catus) have strong negative effects on wildlife, particularly in island ecosystems such as the Florida Keys. We deployed camera traps to study free-ranging cats in National Wildlife Refuges and state parks on Big Pine Key and Key Largo and used spatial models to estimate cat population dynamics and stable isotope analyses to examine cat diets. Top models...
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The Release of Parent-reared Whooping Crane Colts into the Eastern Migratory Population

The Challenge: Whooping cranes have been successfully introduced using costume rearing techniques in either a direct autumn release or in an ultralight led migration from Wisconsin to Florida. In Florida, we have also released parent-reared whooping cranes. Not much is known about the learning that takes place in this K-selected species over the almost one year that the young whooping crane colt...
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The Release of Parent-reared Whooping Crane Colts into the Eastern Migratory Population

The Challenge: Whooping cranes have been successfully introduced using costume rearing techniques in either a direct autumn release or in an ultralight led migration from Wisconsin to Florida. In Florida, we have also released parent-reared whooping cranes. Not much is known about the learning that takes place in this K-selected species over the almost one year that the young whooping crane colt...
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Modeling Sex-specific Demographic Rates in Metapopulations

The Challenge: Research that integrates population dynamics and ecological studies is needed to identify the causal factors involved in population declines and viability. For highly mobile organisms such as birds, “between-patch” movements and the use of different geographic sites and habitats at various stages of the annual cycle can make it difficult to measure the effectiveness of “within-patch...
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Modeling Sex-specific Demographic Rates in Metapopulations

The Challenge: Research that integrates population dynamics and ecological studies is needed to identify the causal factors involved in population declines and viability. For highly mobile organisms such as birds, “between-patch” movements and the use of different geographic sites and habitats at various stages of the annual cycle can make it difficult to measure the effectiveness of “within-patch...
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Survival and Reintroduction of the Laysan Teal

The Challenge: The Laysan Teal is an endangered, endemic, Hawaiian dabbling duck that has been pushed to the brink of extinction numerous times. The previous range includes the Main and Northwestern Hawaiian Islands, and its current range is less than 10 sq. km within the National Wildlife Refuges of Papahānaumokuākea Marine National Monument. This non-migratory waterfowl was eliminated from all...
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Survival and Reintroduction of the Laysan Teal

The Challenge: The Laysan Teal is an endangered, endemic, Hawaiian dabbling duck that has been pushed to the brink of extinction numerous times. The previous range includes the Main and Northwestern Hawaiian Islands, and its current range is less than 10 sq. km within the National Wildlife Refuges of Papahānaumokuākea Marine National Monument. This non-migratory waterfowl was eliminated from all...
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Toxicity of the Non-Steroidal Anti-Inflammatory Drug Diclofenac

One of the hallmarks of non-steroidal anti-inflammatory drugs (NSAID) is the difficulty in predicting potentially toxic effects.Diclofenac is one such NSAID that devastated Asian vulture populations when they fed upon carcasses of livestock treated with the NSAID diclofenac.Because these drugs are widely used, we studied the potential hazard of diclofenac in New World vultures.
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Toxicity of the Non-Steroidal Anti-Inflammatory Drug Diclofenac

One of the hallmarks of non-steroidal anti-inflammatory drugs (NSAID) is the difficulty in predicting potentially toxic effects.Diclofenac is one such NSAID that devastated Asian vulture populations when they fed upon carcasses of livestock treated with the NSAID diclofenac.Because these drugs are widely used, we studied the potential hazard of diclofenac in New World vultures.
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Toxicity of Polybrominated Diphenyl Ethers and Other Flame Retardants to Wildlife

Flame retardants are a class of commonly used household and industrial products. Because of widespread use, there is concern that their presence in the environment can potentially pose a hazard and risk to wildlife.
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Toxicity of Polybrominated Diphenyl Ethers and Other Flame Retardants to Wildlife

Flame retardants are a class of commonly used household and industrial products. Because of widespread use, there is concern that their presence in the environment can potentially pose a hazard and risk to wildlife.
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Contaminant Exposure and Effects—Terrestrial Vertebrates (CEE-TV) Database Summary Findings for Trust Resources in U.S. Coastal Habitats

Scientists and natural resource managers often seek information on the effects various environmental stressors on wildlife.To facilitate this activity, we created a database focused on environmental contaminant exposure and adverse effects in wildlife residing in coastal and estuarine habitat.The Contaminant Exposure and Effects-Terrestrial Vertebrates database is searchable and relatively easy to...
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Contaminant Exposure and Effects—Terrestrial Vertebrates (CEE-TV) Database Summary Findings for Trust Resources in U.S. Coastal Habitats

Scientists and natural resource managers often seek information on the effects various environmental stressors on wildlife.To facilitate this activity, we created a database focused on environmental contaminant exposure and adverse effects in wildlife residing in coastal and estuarine habitat.The Contaminant Exposure and Effects-Terrestrial Vertebrates database is searchable and relatively easy to...
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The Eastern Box Turtle at USGS Patuxent Wildlife Research Center, MD

The Challenge: Once common to forest and backyard habitats, the eastern box turtle (Terrapene carolina) has declined sharply. Threats to box turtles include loss and fragmentation of their habitat, road mortality, and commercial taking for the international pet trade. Researchers at the USGS Patuxent Wildlife Research Center have 70 years of records on a turtle population located within a 12 ha...
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The Eastern Box Turtle at USGS Patuxent Wildlife Research Center, MD

The Challenge: Once common to forest and backyard habitats, the eastern box turtle (Terrapene carolina) has declined sharply. Threats to box turtles include loss and fragmentation of their habitat, road mortality, and commercial taking for the international pet trade. Researchers at the USGS Patuxent Wildlife Research Center have 70 years of records on a turtle population located within a 12 ha...
Learn More