Breeding Birds - Common Wadden Sea Secretariat
... to common eider, arctic tern Sterna paradisaea and little tern Sterna albifrons. All three species have shown nearly annual declines since 2001, and their populations have suffered losses of 20-40% in the last five years. In common eider, downward trends have been reported already for a longer term ...
... to common eider, arctic tern Sterna paradisaea and little tern Sterna albifrons. All three species have shown nearly annual declines since 2001, and their populations have suffered losses of 20-40% in the last five years. In common eider, downward trends have been reported already for a longer term ...
Extended core indicator report
... recently been modified in the EU LIFE project MARMONI for the Baltic Sea by correcting the numbers of birds counted for effects of climate change and is used in this core indicator (i.e. winter temperature, see below and Aunins et al. 2013b). If the number of birds of a population is less than 70% ( ...
... recently been modified in the EU LIFE project MARMONI for the Baltic Sea by correcting the numbers of birds counted for effects of climate change and is used in this core indicator (i.e. winter temperature, see below and Aunins et al. 2013b). If the number of birds of a population is less than 70% ( ...
Full text in pdf format
... the breeding sites for both species are in protected areas, disturbance at nesting places was considered to be the main threat. Direct persecution and electric power lines still cause occasional problems. In deltaic lagoons, erosion and inundation of nesting sites cause breeding failures in DPs, whi ...
... the breeding sites for both species are in protected areas, disturbance at nesting places was considered to be the main threat. Direct persecution and electric power lines still cause occasional problems. In deltaic lagoons, erosion and inundation of nesting sites cause breeding failures in DPs, whi ...
Do Arctic-nesting birds respond to earlier snowmelt? A multi
... growth with the period of peak arthropod abundance, so that young birds can maximize their food intake (McKinnon et al. 2012). Arthropod phenology is strongly influenced by spring and early-summer temperatures so will likely advance with earlier snowmelt (Bolduc et al. 2013). Consequently, we wonder ...
... growth with the period of peak arthropod abundance, so that young birds can maximize their food intake (McKinnon et al. 2012). Arthropod phenology is strongly influenced by spring and early-summer temperatures so will likely advance with earlier snowmelt (Bolduc et al. 2013). Consequently, we wonder ...
Guyana Amazon Tropical Birds Society
... 2007 when the Guyana Amazon Tropical Birds Society (GATBS) began the programme to identify and proposed priority areas for species conservation in the country. The IBA program is only the beginning of a long-term process which aims to consolidate bird conservation in Guyana. Current results show pro ...
... 2007 when the Guyana Amazon Tropical Birds Society (GATBS) began the programme to identify and proposed priority areas for species conservation in the country. The IBA program is only the beginning of a long-term process which aims to consolidate bird conservation in Guyana. Current results show pro ...
Understanding plant dispersal and migration
... Earth, their first collaborative open science conference. With scientists from 100 countries, including more than 400 scientists from developing countries, this was the biggest and most internationally attended event in global change science that has taken place. The conference encompassed a large r ...
... Earth, their first collaborative open science conference. With scientists from 100 countries, including more than 400 scientists from developing countries, this was the biggest and most internationally attended event in global change science that has taken place. The conference encompassed a large r ...
Gray Whale Migration
... Migration is the regular movement of animals from one location to another. Prerequisites for migration: 1. Sustained movement 2. Physical endurance 3. Mechanisms for storing energy 4. Designated food sources on the migration route ...
... Migration is the regular movement of animals from one location to another. Prerequisites for migration: 1. Sustained movement 2. Physical endurance 3. Mechanisms for storing energy 4. Designated food sources on the migration route ...
Bird migration
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans. Migration is driven primarily by availability of food. It occurs mainly in the northern hemisphere, where birds are funnelled on to specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea.Historically, migration has been recorded as much as 3,000 years ago by Ancient Greek authors including Homer and Aristotle, and in the Book of Job, for species such as storks, turtle doves, and swallows. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and scientific studies have used techniques including bird ringing and satellite tracking. Threats to migratory birds have grown with habitat destruction especially of stopover and wintering sites, as well as structures such as power lines and wind farms.The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of tubenoses (Procellariiformes) such as albatrosses circle the earth, flying over the southern oceans, while others such as Manx shearwaters migrate 14,000 km (8,700 mi) between their northern breeding grounds and the southern ocean. Shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas.The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the sun and stars, the earth's magnetic field, and probably also mental maps.