Sentences with phrase «populations of birds of prey»

In autumn, hawks moving south are funneled over Hawk Hill in the Marin Headlands, where the Golden Gate Raptor Observatory conducts long - term citizen science projects in an effort to monitor the populations of birds of prey.

GGRO volunteers have worked for more than three decades to track the populations of these birds of prey during fall migration.

Not exact matches

Birds play an important role in a wide variety of ecosystems as both predator and prey, in controlling insect populations, pollinating and seed dispersal for many plants, and in releasing nutrients on to land and sea in the form of guano.

Early in our service, Dr Hess developed a surgery to help Bald Eagles and other birds of prey overcome a lethal foot disease that was ravaging the population at a time when the Bald Eagle population was struggling to survive.

«This was clearly not realistic, as the estimated maximum numbers of birds killed typically exceeded breeding density and productivity combined, such that the prey populations studied would probably have gone extinct rapidly at a local level or acted as a major sink for birds immigrating from neighbouring areas.»

The mission of the Golden Gate Raptor Observatory (GGRO) is to study migrating birds of prey along the Pacific coast and to promote public awareness of the state of raptor populations.

I predict a major decline has occurred in all the local bird of prey populations in the vicinity of every wind turbine farm in North America.

Some species of marine mammals will be able to take advantage of increases in prey abundance and spatial / temporal shifts in prey distribution toward or within their primary habitats, whereas some populations of birds and seals will be adversely affected by climatic changes if food sources decline or are displaced away from regions suitable for breeding or rearing of young.