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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. A geolocator periodically records ambient light level ...
First described in 1992, a geolocator is a device that periodically records ambient light level (solar irradiance) as a means of determining an organism's location. Geolocators have been especially useful for tracking bird migration because there are small and lightweight ones that do not utilize satellite or radio telemetry for real-time ...
Animal migration tracking is used in wildlife biology, conservation biology, ecology, and wildlife management to study animals' behavior in the wild. One of the first techniques was bird banding, placing passive ID tags on birds legs, to identify the bird in a future catch-and-release. Radio tracking involves attaching a small radio transmitter ...
Light level geolocator, a lightweight electronic archival tracking device, usually used in bird migration. Geolocation, the identification of the real-world geographic location of an object. Geolocation software, software used to deduce the geographic location of another party. GPS navigation device, a device typically used in cars for navigation.
Pop-up satellite tags range in length from about 125–215 mm (4.9–8.5 in) and weigh 36-108 grams in air. A tag must be small compared to the size of the animal, anywhere from 3-5% of the total fish weight, so that it does not interfere with normal behavior. These tags record information such as temperature, magnetics, acceleration, light ...
The birds' habit of returning to the same territory each year allows scientists in Hawaiʻi to attach tiny light level geolocator devices to the birds and retrieve them the following year in the same location. Such research showed that the birds made the 3,000 mi (4,800 km) nonstop flight between Alaska and Hawai'i in 3–4 days.
Using a tiny light-level geolocator biologists have proven that the black poll flies an average of 2540 km (2270 to 2770 km) non-stop over an average of 62 h, up to 3 days, corresponding to about 41 km/h. In 2013, 37 blackpolls from Vermont and Nova Scotia carried a miniaturized geolocator weighing 0.5 g with the harness on their back.
An item tracker can help. These little gizmos typically ride shotgun on a keychain, though you could also toss one in a purse, strap it to a backpack, tuck it in a suitcase and so on. Apple ...