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Characteristics of American Crow Urban Roosts in California

American crows (Corvus brachyrhynchos) roost in urban areas across the United States creating problems resulting from fecal droppings, noise, and health hazards, and a logistic regression model was developed with 4 variables that correctly classified status of 85% of roost or nonroost trees.
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Freshwater Marshes. Ecology and Wildlife Management

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Bird Control in Vineyards Using Alarm and Distress Calls

Certain species of birds are pests for winegrape growers, including the house finch (Carpodacus mexicanus), American robin (Turdus migratorius), and European starling (Sturnus vulgaris) in…
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Comparison of 0.005% and 0.01% diphacinone and chlorophacinone baits for controlling California ground squirrels (Spermophilus beecheyi)

No significant difference in efficacy was found in efficacy owing to bait type, concentration or application method for control of California ground squirrels on rangeland, but repeat testing is needed in other habitat types where alternative foods might reduce the effectiveness of a 0.005% bait application.
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TAPE-RECORDED CALLS DISPERSE AMERICAN CROWS FROM URBAN ROOSTS

Communal roosting is common among corvids (Goodwin 1976:32). An apparent urbanization of American crows (Corvus brachyrhynchos) in the latter half of the twentieth century (e.g., Ryser 1985, Knight…

BIRD DAMAGE AT AQUACULTURE FACILITIES

Use of zinc phosphide for California ground squirrel control

In these studies, pre-baiting had little effect on the efficacy of the ZnP for controlling California ground squirrels.
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Deterring Cliff-Swallow Nesting on Highway Structures Using Bioacoustics and Surface Modifications

Cliff swallows (Petrochelidon pyrrhonota) are migratory birds that breed in colonies and frequently nest on highway structures. Protected by the Migratory Bird Treaty Act of 1918, swallows in their…
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Sonic Broadcast Unit for Bird Control in Vineyards

Many wine grape growers experience bird damage in their vineyards. The potential economic loss provides considerable incentive for growers to invest in successful control strategies. Broadcast alarm…
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Urban crow roosts - a nationwide phenomenon?

We conducted surveys of federal officials nationwide and of local officials in California to determine historical and temporal aspects, location, size, and control of American crow (Corvus…
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