Biological Science Technician surveying breeding birds on a grassland managed by the U.S. Fish and Wildlife Service.
Lawrence Igl, PhD (Former Employee)
Science and Products
Decision support for restoration and management of Service-owned native prairies: Implications for grassland bird communities
More than 100,000 ha of native tallgrass and mixed-grass prairies are managed by the U.S. Fish and Wildlife Service (FWS) in the northern Great Plains. Although prairies in this region evolved with grazing, fire, and climatic variability, management of FWS grasslands often has been passive and involved extended periods of rest. In 2008, the USGS and the FWS initiated a collaborative effort, the...
Long-term changes in pollinator resources (alfalfa, sweetclover, milkweed) and monarch butterfly populations in CRP grasslands
Federal cropland retirement programs are increasingly being used to provide resources for pollinators (e.g., nectar, pollen, host plants). Pollinator-friendly plant species (e.g., alfalfa, sweetclover) were readily included in seed mixes in Conservation Reserve Program (CRP) grasslands since its inception in the 1985 Farm Bill. Through time, some native plant species (e.g., milkweeds) also...
Immune components in eggs of New World blackbirds
Interest in the immune systems of wild birds has increased as public health authorities have recognized that many emerging infectious diseases of wildlife can be transmitted to humans (i.e., zoonoses). Eco-immunology is an emerging field that characterizes how immune adaptations of wild species vary as a result of evolution in different habitats and niches. Present understanding of the influence...
The effects of management practices on grassland birds
With support from the U.S. Prairie Pothole Joint Venture (PPJV), the U.S. Forest Service, and The Nature Conservancy, Northern Prairie is synthesizing literature on the effects of management practices on grassland bird species. The need for these syntheses was identified by the PPJV, a part of the North American Waterfowl Management Plan, in support of its objective to stabilize or increase...
Response of grassland birds to habitat characteristics, oil wells, and roads in managed grasslands in the Little Missouri National Grassland in North Dakota
The U.S. Forest Service defines sensitive species as species that need special management to maintain and improve their status on National Forests and Grasslands, and prevent a need for listing under the Endangered Species Act. The Sprague’s pipit and Baird’s sparrow are listed as sensitive species in the Northern Region of the U.S. Forest Service. These species require large patches of native...
Developing techniques to census and monitor American white pelicans and other colonial waterbirds at Chase Lake National Wildlife Refuge in North Dakota
Monitoring colonial waterbirds is essential to detect and to provide insights about changes in waterbird distribution and abundance. For colonial waterbirds, major population fluctuations often go undetected because surveys are not conducted regularly, inventory methods are inconsistent, or estimates have unknown reliability. The waterbird colony at Chase Lake National Wildlife Refuge in North...
Breeding bird use of grasslands enrolled in the Conservation Reserve Program in the northern Great Plains
Agriculture is the dominant land use on privately owned lands in the northern Great Plains of the United States. Management decisions on agricultural lands are influenced by a variety of policies and programs established by the federal government in periodic Farm Bills. In 1985, Congress passed the Food Security Act. Title XII of the Act established the Conservation Reserve Program or CRP, a...
Surveying breeding birds
Biological Science Technician surveying breeding birds on a grassland managed by the U.S. Fish and Wildlife Service.
Great egret
Great egret at a multi-species waterbird nesting colony at Chase Lake National Wildlife Refuge, North Dakota.
Great egret at a multi-species waterbird nesting colony at Chase Lake National Wildlife Refuge, North Dakota.
Biological Science Technician surveying breeding birds
Biological Science Technician surveying breeding birds on both idle and hayed portions of a CRP grassland in Sheridan County, Montana
Biological Science Technician surveying breeding birds on both idle and hayed portions of a CRP grassland in Sheridan County, Montana
Upland Sandpiper fledgling
Image of Upland Sandpiper fledgling taken during Breeding Bird Surveys in Day County, South Dakota.
Image of Upland Sandpiper fledgling taken during Breeding Bird Surveys in Day County, South Dakota.
Little Blue Heron Siblings
Little blue herons are a species recorded in the historical bird phenology cards.
Little blue herons are a species recorded in the historical bird phenology cards.
Yellow-Headed Blackbird Fledgling.
Yellow-headed blackbird fledgling. This species is also recorded in the Bird Phenology Program cards.
Yellow-headed blackbird fledgling. This species is also recorded in the Bird Phenology Program cards.
Blue Herons
Little blue heron siblings.
A Clay-Colored Sparrow Nest
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.
Science and Products
Decision support for restoration and management of Service-owned native prairies: Implications for grassland bird communities
More than 100,000 ha of native tallgrass and mixed-grass prairies are managed by the U.S. Fish and Wildlife Service (FWS) in the northern Great Plains. Although prairies in this region evolved with grazing, fire, and climatic variability, management of FWS grasslands often has been passive and involved extended periods of rest. In 2008, the USGS and the FWS initiated a collaborative effort, the...
Long-term changes in pollinator resources (alfalfa, sweetclover, milkweed) and monarch butterfly populations in CRP grasslands
Federal cropland retirement programs are increasingly being used to provide resources for pollinators (e.g., nectar, pollen, host plants). Pollinator-friendly plant species (e.g., alfalfa, sweetclover) were readily included in seed mixes in Conservation Reserve Program (CRP) grasslands since its inception in the 1985 Farm Bill. Through time, some native plant species (e.g., milkweeds) also...
Immune components in eggs of New World blackbirds
Interest in the immune systems of wild birds has increased as public health authorities have recognized that many emerging infectious diseases of wildlife can be transmitted to humans (i.e., zoonoses). Eco-immunology is an emerging field that characterizes how immune adaptations of wild species vary as a result of evolution in different habitats and niches. Present understanding of the influence...
The effects of management practices on grassland birds
With support from the U.S. Prairie Pothole Joint Venture (PPJV), the U.S. Forest Service, and The Nature Conservancy, Northern Prairie is synthesizing literature on the effects of management practices on grassland bird species. The need for these syntheses was identified by the PPJV, a part of the North American Waterfowl Management Plan, in support of its objective to stabilize or increase...
Response of grassland birds to habitat characteristics, oil wells, and roads in managed grasslands in the Little Missouri National Grassland in North Dakota
The U.S. Forest Service defines sensitive species as species that need special management to maintain and improve their status on National Forests and Grasslands, and prevent a need for listing under the Endangered Species Act. The Sprague’s pipit and Baird’s sparrow are listed as sensitive species in the Northern Region of the U.S. Forest Service. These species require large patches of native...
Developing techniques to census and monitor American white pelicans and other colonial waterbirds at Chase Lake National Wildlife Refuge in North Dakota
Monitoring colonial waterbirds is essential to detect and to provide insights about changes in waterbird distribution and abundance. For colonial waterbirds, major population fluctuations often go undetected because surveys are not conducted regularly, inventory methods are inconsistent, or estimates have unknown reliability. The waterbird colony at Chase Lake National Wildlife Refuge in North...
Breeding bird use of grasslands enrolled in the Conservation Reserve Program in the northern Great Plains
Agriculture is the dominant land use on privately owned lands in the northern Great Plains of the United States. Management decisions on agricultural lands are influenced by a variety of policies and programs established by the federal government in periodic Farm Bills. In 1985, Congress passed the Food Security Act. Title XII of the Act established the Conservation Reserve Program or CRP, a...
Surveying breeding birds
Biological Science Technician surveying breeding birds on a grassland managed by the U.S. Fish and Wildlife Service.
Biological Science Technician surveying breeding birds on a grassland managed by the U.S. Fish and Wildlife Service.
Great egret
Great egret at a multi-species waterbird nesting colony at Chase Lake National Wildlife Refuge, North Dakota.
Great egret at a multi-species waterbird nesting colony at Chase Lake National Wildlife Refuge, North Dakota.
Biological Science Technician surveying breeding birds
Biological Science Technician surveying breeding birds on both idle and hayed portions of a CRP grassland in Sheridan County, Montana
Biological Science Technician surveying breeding birds on both idle and hayed portions of a CRP grassland in Sheridan County, Montana
Upland Sandpiper fledgling
Image of Upland Sandpiper fledgling taken during Breeding Bird Surveys in Day County, South Dakota.
Image of Upland Sandpiper fledgling taken during Breeding Bird Surveys in Day County, South Dakota.
Little Blue Heron Siblings
Little blue herons are a species recorded in the historical bird phenology cards.
Little blue herons are a species recorded in the historical bird phenology cards.
Yellow-Headed Blackbird Fledgling.
Yellow-headed blackbird fledgling. This species is also recorded in the Bird Phenology Program cards.
Yellow-headed blackbird fledgling. This species is also recorded in the Bird Phenology Program cards.
Blue Herons
Little blue heron siblings.
A Clay-Colored Sparrow Nest
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.
A colorful clay-colored sparrow nest. These sparrows live in brushy grasslands and prairie habitats.