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A red knot equipped with a GLS.. A light level geolocator, light-level logger or global location sensor (GLS) is a lightweight, electronic archival tracking device, usually used in bird migration research to map migration routes, identify important staging areas, and sometimes provide additional ecological information.
Vankalai Sanctuary, also known as the Mannar Bird Sanctuary, is located in the northwest of Sri Lanka in the Mannar District. This site covers an area of 4,839 ha (11,960 acres). This site covers an area of 4,839 ha (11,960 acres).
Sri Lanka is a tropical island situated close to the southern tip of India. The bird life of Sri Lanka is very rich for its size and more than 500 species have been recorded. In addition to the many resident birds, a considerable number of migratory species winter in the country to escape their northern breeding grounds.
Numerous varieties of water and wader birds are found in the sanctuary including cormorants, ducks, egrets, flamingoes, herons, ibis, pelicans and storks. [1] [9] [12] The sanctuary is a haven for birds migrating along Sri Lanka's east coast. [9] Elephants are also found in the sanctuary. [13] [14]
Photographic Guide to Birds of Sri Lanka (2000) - ISBN 1-85974-511-3 [16] Sri Lanka Nature Sounds (2011) The Bird Sounds of Sri Lanka. An Identification Guide Part 1 (1997, 2nd ed. 2001) audio tape; The Bird Sounds of Sri Lanka. An Identification Guide Part 2 (1998) audio tape; The Bird Sounds of Sri Lanka. 99 Species (2003) audio CD
One major hurdle to tracking the movements of birds and especially insects is creating a transmitter small enough to place on individual animals. The ICARUS project currently implements 5 g radio transmitters that include a GPS receiver, but has plans to use devices weighing less than 1 g in the future. Wikelski believes that within about five ...