Scientist community and testimonies

Argos is worldwide and we aim to enhance an online community to connect with people and information that interest you no matter where you are on the planet. Take the opportunity to share with us your experiences, pictures and ideas.


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A male cuckoo with a tag in Muan, 2019 (ID62399 (Credit Jin-Won Lee)

27.03.2023 Animal tracking applications Cuckoos’ migration from South Korea to the South of Africa

Common cuckoos are found in Eurasia, from Europe to Korea. All over the continent, they migrate to Africa, while they parasite different birds’ nests. Tracking them using Argos helps understand the similarities and differences between all of them. Photo: A male cuckoo with a tag in Muan, 2019 (ID62399 (Credit…
European eel fitted with a pop-up satellite tag (Credit Alan Walker, from [Wright et al., 2022])

13.03.2023 Animal tracking applications Tracking eels to the Sargasso Sea

European eels are a critically endangered species. They have a complex life-cycle with their spawning area thought to be in the Sargasso Sea. A study managed to track them to their breeding place for the first time using pop-up tags.   Photo: European eel fitted with a pop-up satellite tag…
an arctic fox with an Argos PTT in summer (credit Nicolas Bradette

28.02.2023 Animal tracking applications Why Arctic foxes travel long distances?

The Arctic foxes have been noticed as travelling very long distances over the whole Arctic regions. Long time series of tracks retrieved by Argos enables to analyse this behaviour to understand why they might go so far, and whether they are staying there, at which period of their life, etc.
An Eurasian woodcock with an Argos PTT

16.02.2023 Animal tracking applications Eurasian Wookcocks’ migrations to breeding sites

Eurasian Woodcocks are birds which migrate across Europe. Their studies have long been led using rings, but the advent of small-enough satellite telemetry emitters now enables to follow them all along their migrations, from wintering to breeding sites, and to know more about the latter, in particular.  …
an equipped black-tailed godwit

03.02.2023 Animal tracking applications Black-tailed godwits are breeding in areas of intensive agriculture

Some bird species like the black-tailed godwits are nesting on ground, in grasslands. However, across all of lowland Europe, such areas have been transformed for intensive agriculture. Tracking by Argos helped to determine whether there is any space left in those highly cultivated areas for such farmland-specialists.  …
Female elephant seal with Argos PTTs

19.01.2023 Animal tracking applications Tracking northern elephant seals in ocean eddies

Understanding how a marine species uses the features of its environment is important for conservation. The northern elephant seals are close cousins to their southern equivalents. A number of tracking data exists, enabling to study their behaviors in comparison with ocean eddies and other environment data from remote…
Maud Pageot Argos support

05.01.2023 Argos news & events Argos support: your daily operations partner

Last year we met with Charles Drieu La Rochelle, member of the user support team in France, to find out more about CLS Group’s excellent customer care. But, did you know that he’s part of a dynamic duo? We thought it was time to introduce the other…
Rehabilitated adult Harpy Eagle with an Argos satellite transmitter

02.01.2023 Animal tracking applications Selecting sites for Harpy Eagles’ releases

Harpy Eagles are threatened birds of prey of Central and South Americas. A study show why and how releases of rehabilitated or captive-born animals should consider home range characteristics and habitat preferences.   The Harpy Eagle (Harpia harpyja), found in tropical lowland evergreen forest from south…
Nesting female tagged by night

20.12.2022 Animal tracking applications Loggerhead turtles and Mediterranean Marine Protected Areas

Assessing whether an endangered species visits the protected areas – or not – is an important indicator of their relevance. Tracking of loggerhead turtles in the Mediterranean Sea show that modifying and adding protected area would be necessary for their conservation.   Main photo: Nesting female tagged by night…
Woodpigeon without and with an Argos PTT

28.11.2022 Animal tracking applications Common Woodpigeons keep their breeding sites, change their wintering ones

Tracking animals help in understanding their behaviour, which can benefit to their protection, even for abundant species such as the common woodpigeons. Their behavioral plasticity, demonstrated by such study should help them in maintaining their population. The common woodpigeon (Columba palumbus) is a very abundant and…
Release of a satellite-tagged adult male beluga whale

17.11.2022 Animal tracking applications Beluga whales avoid ship noises

Beluga whales are Arctic cetacean very sensitive to noises, including  underwater ship noises. For a long time, scarcity of such ships in the region meant it wasn’t a concern. With ice-free routes opening for longer period with global climate change, the question now arises.   As…
a smooth hammerhead shark with an Argos-transmitted pop-up archival tag

20.10.2022 Animal tracking applications Do Juvenile Smooth Hammerhead sharks have a nursery in the Azores?

Smooth hammerhead sharks are a threatened species of shark – as most shark species. Locating their essential habitats, like the nurseries could make a difference in their protection. Argos can help by tracking juveniles.   Sharks are among the most threatened marine species, as they are…
whale at sea

28.09.2022 Animal tracking applications A new tag to record diving behavior of large whales

A new tag dedicated to large whale has been developped and tested. It enables to record dive behaviors, using a software detection event to better summarize and compress the data to be used during long-range travels over several months.   As we saw in a previous…
searching for Argos tag with goniometer

26.09.2022 Animal tracking applications Lost shark tag found thanks to the Animal Telemetry Network and the Argos goniometer

Marcus Drymon, Assistant Extension Professor at Mississippi State University Marine Fisheries Specialist and Dr. Greg Skomal, an accomplished marine biologist who we interviewed for Shark Week, were recently able to recover a lost shark tag thanks to NOAA’s Animal Telemetry Network (ATN) and an Argos goniometer loaned…
Argos ear tag

23.09.2022 Animal tracking applications Breaking news: Engineers and scientists collaborate to develop the first open-source Argos ear tag

For over a decade, researchers have been working on improving radio telemetry devices for polar bears. In 2018, the U.S. Fish and Wildlife Service, the World Wildlife Fund, IDEO, and MistyWest teamed up to develop a new Argos-based polar bear ear tag. After two years of…
Rocketlab launch

21.09.2022 Argos news & events Argos metamorphosis update: not one but two Argos-4 instruments to be launched in the coming weeks!

We are just few weeks away from the planned launches of two Argos-4 payloads, an advanced satellite instrument that will track the movement of wildlife, as well as critical environmental data around the world. Argos-4 will ensure the continuity of the Argos-2 & Argos-3 missions while…
a Hudsonian godwit equipped with an Argos PTT

12.09.2022 Animal tracking applications Hudsonian godwits cross the windy ocean

The Hudsonian godwit is a migratory bird travelling a marathon, transoceanic flight from South America to Arctic or sub-Arctic North America. Their flight paths tracked using Argos, in relation with variable winds, can help understand how they travel such long distances. Photo: a Hudsonian godwit equipped with an…
Leafscale Gulper Shark

01.09.2022 Argos news & events Dog recovers lost Argos tag from a Leafscale Gulper Shark

At the end of March 2022, Cristina Rodríguez-Cabello researcher of the Spanish Institute of Oceanography (IEO) in Santander (Spain), was working at her Centre when she received an unexpected yet exciting call from France. One of the archival tags she had attached to a deep-water shark…
a lake charr with an Argos archival tag

31.08.2022 Animal tracking applications Lake charr ecotypes’ habitats differ

Lake charrs are freshwater fish found in the Laurentian Great Lakes (North America), among others. They nearly disappeared, but restoration was successful at least in Lake Superior. Understanding the different habitats of the lake charr ecotypes can help in restoring them in all of the Great Lakes. Photo:…
A Philippine eagle in the wild (left) and after being fitted with a satellite transmitter

17.08.2022 Birds tracking Philippine eagles forage in human fragmented forests

Protecting critically endangered species aims to better assess where and when the main threats to these species occurs. Using satellite telemetry technology, Philippine eagles were tracked to define their home range and habitat use across their tropical forest breeding grounds and within human-occupied areas. Main Photo: A Philippine…
A reddish egret with an Argos PTT

01.08.2022 Birds tracking Identifying reddish egrets stopover sites to protect their migrations

Migratory birds, especially those which depend on coastal wetland habitats, are among the threatened animals. Identifying the key sites in their life cycle, including the stopovers used during migration, is important for  conservation efforts. Argos satellite telemetry can help by providing locations along the migrations and measuring residency…
Shark in the water

26.07.2022 Argos news & events Shark week: Dr. Gregory Skomal talks tagging and what the future constellation will bring

“I think anyone who’s used Argos will have to admit that they’ve learned something revelatory. The more we use Argos to track animal movements, the more we see that their movements are far more complex and of greater scale than we ever imagined.” Featured photo credit:…
a loggerhead turtle with an Argos PTT

19.07.2022 Animal tracking applications Japan-nesting loggerhead turtles foraging habitats

Loggerhead turtles can forage either on continental shelf or in the open ocean. The North Pacific population, nesting whole in Japan show both behaviours. Their foraging areas are pinpointing using isotopic analysis and Argos tracking, to better define conservation measures. Photo: a loggerhead turtle with an Argos PTT…
a female juvenile reef manta ray

05.07.2022 Animal tracking applications A nursery for juvenile reef manta rays

Reef manta rays are a vulnerable species. They grow up in protected shallow areas such as lagoons. Tracking them with Argos can help to confirm that a given lagoon is a nursery for this species   Photo: a female juvenile reef manta ray sized 220 cm (wingspan; they…
a juvenile grey-headed albatross close to fledging with an Argos PTT

20.06.2022 Animal tracking applications Juvenile grey-headed albatrosses learn to decode their environment

Uncovering how young animals learn to move efficiently and find food, is one of the many possible uses of satellite telemetry. Here, researchers from British Antarctic Survey satellite-tracked juvenile grey-headed albatrosses to understand the effect of environmental conditions during this critical early stage of development. Photo: a…
a juvenile harp seal with an Argos PTT

13.06.2022 Marine animals tracking Harp seal juveniles learn on their own

Harp seal juveniles leave their native ice pack to forage and migrate on their own. Tracking them and recording their dive can help understand how they manage their first year. Ultimately, the question is their plasticity with respect to environmental changes. Photo: a juvenile harp seal with…
Charles Drieu La Rochelle

09.06.2022 Argos news & events How can CLS support your daily operations with Argos?

This month we’ve decided to take you back stage to meet Charles Drieu La Rochelle, member of the user support team in France, to find out more about CLS Group’s excellent customer care. What are the most frequently asked questions? When is the team available? Charles tells us…
kineis tests

31.05.2022 Argos news & events Argos metamorphosis update: Full-scale testing of Kinéis’ 25 nanosats has begun!

Ever wondered how small tags like the one on this cuckoo can communicate with satellites that are up to 650 km away? It all comes down to the highly sensitive receivers that make the Argos system so unique. The slightest radiofrequency interference between the different instruments…
An Egyptian goose with an Argos PTT in flight

25.05.2022 Birds tracking How do Egyptian geese find their way?

One of the mysteries of migrant animals is their ability to find their way back and forth during their long-range travels. Several hypothesis were tested on Egyptian geese to try to understand their navigation capacity. It seems they learn their way around.   Photo: an Egyptian goose with…
An eel in the sea with a pop-up tag

10.05.2022 Marine animals tracking How many Mediterranean migrating eels are eaten on their way to the Atlantic?

Analysis of migrating eels’ tracks can provide with estimate of the rate of predation on them. It seems that half of the migrating silver eels released on the French Mediterranean coast can be consumed by marine mammals before reaching the Gibraltar Straight. Assessing such natural threats to an…