The Lewis River Hydroelectric Projects - PacifiCorp

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Speelyai Park—Interpretive sign #2 (Natural History) Location: Size: Title: Main Content: Speelyai Park TBD The Eagle and the Osprey If you spend a while watching Speelyai Bay, you stand a good chance of spotting an osprey. These large, white-breasted birds perch at the tops of trees around the bay, or dive to snatch fish from the water. And if you spot a big bird of prey that’s darker than an osprey, with a flatter-winged style of flight, take a closer look—it might be a bald eagle. Back in the 1970s and 1980s, it was rare to see an osprey or an eagle along the Lewis River. Decades of pesticide poisoning and habitat loss had reduced the populations of these magnificent fish-eating raptors to almost nothing throughout the continental US. By 1986, when PacifiCorp flew the first aerial surveys for eagles and ospreys along the Lewis, there were only seven osprey nests found between Woodland and upper Swift Reservoir—and there were no eagle nests at all. Today, however, the great birds are back. In a given summer, as many as 30 osprey nests may be active along the river, and there may be as many as 11 active eagle territories. What has changed America’s increasing awareness of the dangers of certain pesticides led to much stricter regulations, and fewer of the most noxious chemicals entering the birds’ food. This led to the birds’ recovery around the country. Here at the Lewis River, increased fish populations, partly due to enhancement programs, have provided better forage for the big birds. And PacifiCorp wildlife managers have worked to provide enhanced roosting, nesting, and perching sites. Main Captions: A bald eagle nest may be as big across as a king-size bed, and weigh as much as a car. Ospreys and eagles in flight can be distinguished by their silhouettes. Ospreys fly with their wings bent in a slight crook, while eagles usually soar on flatter wings. Sidebar: How do you attract an osprey Build it some furniture! One of PacifiCorp’s most visible and successful habitat enhancement programs is the creation of snags and the protection of roosting trees for bird habitat. Ospreys prefer to build their large nests on high places overlooking the water. They like dead-topped trees with commanding views. To provide ospreys with more suitable nest sites, foresters on PacifiCorp lands selectively top some tall trees, creating standing dead trees called Appendix 1: panel profiles Lewis River Draft I&E Plan page 19
“snags.” Chainsaw cuts on the top surfaces of the snags provide the birds with crevices in which to stuff the foundation twigs for the nest. Sidebar Captions: Photo of woodpecker at hole Snags also provide important habitat for woodpeckers, chickadees, and other birds that make cavities in dead trees or rely on cavities for nesting. Photo of snag with nest and/or holes PacifiCorp has created hundreds of snags along Merwin, Yale, and Swift reservoirs. Watch for them (many are topped with osprey nests or riddled with holes) as you explore. Photo of eagle at roost Studies have shown that eagles prefer large, open-limbed trees for roosting and resting at night. PacifiCorp identifies, protects, and enhances eagle roost sites at many locations along the Lewis. Images: Photos or illustrations of eagles and osprey. Photos of foresters creating snags. Photo of eagle nest and osprey nest. Photos of snags. Photo of eagle at roost. Appendix 1: panel profiles Lewis River Draft I&E Plan page 20
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The Lewis River Hydroelectric Projects - PacifiCorp

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