Images

A Columbian black-tailed deer photographed by a trail cam in the fall of 2016 on the site of the former Mills Reservoir on the Elwha River. The remnants of the Glines Dam are visible in the background.

A giant garter snake (Thamnophis gigas) slithering through grass, photographed during field work in western Oregon.

A giant garter snake (Thamnophis gigas) curled up in dry grass in Oregon, periscoping its head.

A gravid (carrying eggs) female giant garter snake photographed in a grassy field in Oregon.

A giant garter snake (Thamnophis gigas) curled up in a field of dry grass in Oregon.

A rock jetty stretches out into the water at Bailey's Beach, Newport Rhode Island

A vegetated drainageway wetland on Bureau of Land Management Land near Rawlins, WY. The Pacific Northwest eDNA Laboratory is working with the BLM on incorporating eDNA sampling into its Assessment, Inventory, and Monitoring (AIM) Strategy for assessing natural resources in riparian areas and wetlands.

A giant garter snake (Thamnophis gigas) with orange coloration, photographed during field work in Oregon.

Instructors teaching line-point intercept vegetation sampling methods to field technicians at a Bureau of Land Management Riparian & Wetland Assessment, Inventory, and Monitoring (AIM) strategy training near Elko, NV. The Pacific Northwest eDNA Laboratory is working with the BLM to incorporate eDNA sampling into the AIM strategy.

An autonomous recording unit--or ARU--deployed at Ankeny National Wildlife Refuge in Jefferson, Oregon. The ARU is set to record 5-10 minutes of audio every 30 minutes during the time of day when male bullfrogs exhibit their loud breeding calls. Audio evidence of bullfrog presence can be used for early response to invasion.

The Columbia River flowing through the Hanford reach of the arid Columbia River basin, eastern Washington. This reach is one of the few undammed segments of the Columbia River within the United States. Photograph taken from the White Bluffs, composed of sediment deposited in late Miocene and Pliocene Lake Ringold which occupied the Pasco Basin.

The Chesapeake Bay watershed, or draingage basin, encompasses six states - New York, Pennsylvania, West Virginia, Maryland, Delaware, Virginia, and the District of Columbia. A drainage basin is a giant system of creeks, streams, and rivers that all flow into a common outlet, which in this case is the Chesapeake Bay.

Thumbnail image of plain language summary of:

Figure 4 from Katzner, et. al., 2020

This radiograph, or x-ray, is of a bald eagle that had ingested lead. The cluster of bright white spots in its gut are lead shotgun pellets eaten by the eagle.

This deer was shot with a lead bullet. The bright white spots scattered throughout its body are fragments of lead from that bullet. These fragments can be eaten by scavengers, such as eagles, when they feed upon a gut pile or carcass left out in the field.

Golden eagle populations in North America are either holding steady or possibly in decline and below the number that which the environment can support.

Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is a federally listed threatened species. Ninety-seven percent of their range are small headwater streams in the Great Basin of North America.

Photo of three bald eagles captured on a game camera. There are two adults with a juvenile.

Wind turbines at the San Gorgonio Pass Wind Resource Area north of Palm Springs in California.

A stream flowing through Gifford Pinchot National Forest near Packwood Lake in Washington State.