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  • All fields: control
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Display: 20

    • Regrowth

    • Adults; Agricultural ecosystems; Agriculture; Amphibious vehicles; Aquatic environments; Aquatic plants; Banks; Biological control; Boating; Boats; Coastal environments; Ecosystem recovery; Emblems; Equipment; Fire management; Foliage; Habitat...
    • FWS employee examines an area of regrowth from an airboat.
    • Regrowth area

    • Adults; Agricultural ecosystems; Agriculture; Aquatic environments; Aquatic plants; Banks; Biological control; Boating; Boats; Coastal environments; Ecosystem recovery; Emblems; Equipment; Fire management; Foliage; Habitat conservation; Habitat...
    • Area of regrowth.
    • This fish is trouble!

    • Adults; Aquatic environments; Biologists (USFWS); Boating; Boats; Ecosystem recovery; Emblems; Employees (USFWS); Environmental quality; Fishes; Fishing; Habitat conservation; Habitat fragmentation; Habitat restoration; Management; Personnel;...
    • A Big Muddy National Wildlife Refuge employee holds an Asian carp, (Invasive species), for the camera.
    • The ones that did not get away

    • Adults; Aquatic environments; Biologists (USFWS); Boating; Boats; Ecosystem recovery; Emblems; Employees (USFWS); Environmental quality; Fishes; Fishing; Habitat conservation; Habitat fragmentation; Habitat restoration; Management; Personnel;...
    • Big Muddy National Wildlife Refuge employees hold an Asian carp, (Invasive species), for the camera.
    • The fish are jumping

    • Adults; Aquatic environments; Biologists (USFWS); Boating; Boats; Ecosystem recovery; Emblems; Employees (USFWS); Environmental quality; Fishes; Fishing; Habitat conservation; Habitat fragmentation; Habitat restoration; Management; Personnel;...
    • These Big Muddy National Wildlife Refuge employees electrofish for the Asian carp, (Invasive species).
    • Tree catches fish

    • Adults; Aquatic environments; Biologists (USFWS); Boating; Boats; Ecosystem recovery; Emblems; Employees (USFWS); Environmental quality; Fishes; Fishing; Habitat conservation; Habitat fragmentation; Habitat restoration; Management; Personnel;...
    • This Asian carp, (Invasive species), jumps up to the trees to escape the long arm of the biologists.
    • Fish flying in formation.

    • Adults; Aquatic environments; Biologists (USFWS); Boating; Boats; Ecosystem recovery; Employees (USFWS); Fishes; Fishing; Personnel; Population control; Resource management; Service patch; Uniforms; Wildlife refuges; Work of the Service; Invasive...
    • These Asian carp seem to be flying in formation as they jump out of the water to flee from the electrofishing.
    • Prescribed burn

    • Adults; Biological control; Fire management; Foliage; Grasslands; Habitat conservation; Habitat fragmentation; Invasive species; Personnel; Prescribed burning; Resource management; Uniforms; Vegetation; Wildlife refuges; Work of the Service;...
    • Prescribed burn on the refuge.
    • Prescribed burn

    • Adults; Biological control; Fire management; Foliage; Grasslands; Habitat conservation; Habitat fragmentation; Invasive species; Personnel; Prescribed burning; Resource management; Uniforms; Vegetation; Wildlife refuges; Work of the Service;...
    • Smoke filled prescribed burn on the refuge.
    • Jim Voelzer oral history transcript

    • Aircraft; Aviation; Biologists (USFWS); Employees (USFWS); Biography; History; Surveying; Management; Migratory birds; Bird banding; Waterfowl;
    • Jim Voelzer oral history transcript as conducted by John Cornely.
    • Rat trap setting, Kiska Island

    • AMNWR; Alaska Maritime National Wildlife Refuge; Aleutian Island Unit; Islands; Rat control
    • Alaska Maritime National Wildlife Refuge biologist Jeff Williams sets a rodent trap on Kiska Island
    • Phragmites again!

    • Aquaculture; Aquatic environments; Aquatic plants; Biological control; Ecosystem recovery; Employees (USFWS); Environmental quality; Foliage; Habitat conservation; Habitat fragmentation; Habitat restoration; Invasive species; Resource management;...
    • Alligator River National Wildlife Refuge employee inspects a patch of phragmites, an invasive species on the refuge.
    • Wyoming toads and cattle: at home on the range

    • Aquatic animals; Biologists (USFWS); Extinctions; Endangered species; Amphibians;
    • Biologists feared that the Wyoming toad was extinct until 1987 when a fisherman discovered a population at Mortenson Lake on Swanson’s land. The discovery created excitement about a chance to save the species and its habitat, and it led Swanson...
    • Capturing nutria

    • Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
    • A safe trap awaits a nutria to venture out of the water and investigate. The animals are trapped in order to tag them to better understand the habits of nutria and to control populations.
    • Habitat suitability index models: Gadwall (breeding)

    • Aquatic birds; Biological control; Habitat conservation; Migratory birds; Wetlands;
    • The basis for this HSI model was developed in a workshop that included the following waterfowl biologists form the Northern Prairie Wildlife Research Center, Jamestown, ND: Leo Kirsch (retired), John Lokemoen, and George Swanson. These individuals...
    • Habitat suitability index models: Blue-winged teal (breeding)

    • Aquatic birds; Biological control; Habitat conservation; Migratory birds; Wetlands;
    • This document is part of the Habitat Suitability Index (HSI) Model Series [Biological Report 82(10)] which provides habitat information useful for impact assessment and habitat management. Several types of habitat information are provided. The...

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