This website summarizes the work of researchers that are affiliated with the research groups of Theunis Piersma at the University of Groningen and the Royal NIOZ Netherlands Institute for Sea Research, and our many collaborators.

This map uses tracks of one bird in each flyway to take you along to where our projects on "tracking and tracing shorebirds" are hosted. Each flyway has a dedicate page where you will find more tracks and specific links [...] more


Fifteen years in the making, some #marathonmigrants are now enabled to demonstrate their capacity as integrative, down-to-Earth Observers - at appropriate spatial scales!


#migration #conservation #agriculture #ClimateChange

chat_bubble 5autorenew 70favorite 182

@waddentweets met 'economie' bedoelen jullie toch zeker 'korte termijn economie', want voor de lange termijn zijn weerbare biodiverse wadden juist erg nodig?

favorite 2
Photo of a Shiba InuPhoto of a Shiba Inu

Voorbeelden van nieuwe #kennis door werk van boeren-professor Jukema gebaseerd op vogelvangsten met #wilsternet.
28 opzienbarende ontdekkingen aan #trekvogels! #kemphaan #grutto #goudplevier
In: Lumeij e.a. (red.) 2008. Beter één vogel in de hand...@KNNVUitgeverij

favorite 4
Photo of a Shiba InuPhoto of a Shiba InuPhoto of a Shiba Inu

Een heel oud ambacht, grote passie, en met oud & jong op jaarvergadering in bovenzaal van Het Wapen van Baarderadeel in Jorwert nog steeds SPRINGLEVEND!
Prachtig verhaal over snel greppeland-verlies rond Wommels & Mantgum door Gerard Westerhuis van @univgroningen

autorenew 2favorite 2
Photo of a Shiba InuPhoto of a Shiba InuPhoto of a Shiba Inu

Heftig & ontroerend verhaal in @lc_nl over #trekvogel-onderzoek van boeren-professor Joop Jukema. Hindernissen die hij ondervindt om aan cultuur & wetenschap bij te kunnen dragen. Koppeling van werk van 'amateurs' & professionals is geheim achter >100 publicaties!

autorenew 3favorite 16
Photo of a Shiba Inu

It was great to discover at that black-tailed #godwit SLINKEWEI managed to leave the Sahara coast again for a continued #migration to the #Tagus estuary, Portugal. This also illustrates, once more, the importance of this area! #grutto

autorenew 2favorite 10
Photo of a Shiba InuPhoto of a Shiba InuPhoto of a Shiba Inu

BIOMONITORING! In new paper we show that prey ingestion rates of #spoonbills in #WaddenSea can be estimated from acceleration data. In this way spoonbills can directly essay spatial & temporal variation in availability of small fish & shrimp! #OpenAccess:

autorenew 9favorite 22

@ja_bakker @waarneming @Natuurmonument @vogelnieuws @Sovon @KeningGreide De kans is groot dat het bij deze vroegelingen om IJslandse grutto's gaat, Jorien. Voor het echte bewijs moet je dagelijks even naar deze website:
Kun je zien wanneer de eerste individuen echt vanuit de stopplaatsen in Portugal & Spanje naar ons toekomen.

chat_bubble 2favorite 4

The Frisian islands with Dutch Wadden Sea in foreground, looking east & northeast across German and Danish Parts of Wadden Sea, with the Siberian tundra in the distance (relevant as breeding area for a lot of birds using the foreground) made this NASA picture already much used.

chat_bubble 2autorenew 9favorite 44
Photo of a Shiba Inu

But: does #feather number goes up with body size?
In 1988 Piersma published figure for great crested #grebes, really counted and published in @ARDEA_journal. 14,000 rather than more than 20,000, even though the smaller grebes are always in water...

autorenew 1favorite 3
Photo of a Shiba Inu

HOERA! maar de meesten zijn nog onderweg!
En het leuke is dat iedereen deze #grutto-trek vanuit de luie stoel kan volgen.
Klik op:
Het gaat hier om grutto's met zenders die in Portugal, Spanje, Duitsland en Nederland zijn aangebracht. Leef met ze mee!

chat_bubble 1autorenew 6favorite 15
Photo of a Shiba Inu

Another view on the world's largest ocean, criss-crossed over by migrating landbirds!

#openaccess paper at:

The Pacific as the world’s greatest theater of bird migration: Extreme flights spark questions about many different things

autorenew 6favorite 10
Photo of a Shiba Inu

Country-wide breeding distribution & home ranges of black-tailed #godwits (#grutto, national bird of NL) assessed in unbiased ways (using individuals tagged during staging in Iberia) shows how sparse suitable grassland has become.
Summary now available at:

autorenew 8favorite 10
Photo of a Shiba Inu

The real-time online #tracking resource of @GlobalFlyway nicely shows surge in #migration of black-tailed #godwits from wintering areas in West-Africa to staging areas in Portugal & Spain. Several tagged birds overfly Morocco and #Atlantic ocean right now.

autorenew 7favorite 13

Magnifique. Le Guérande est très probablement l'endroit où notre #spoonbill SINAGOTE traîne en ce moment. Lisez à ce sujet l'édition française du livre qui porte ce nom :

@lynxedicions @unep_aewa @MavaFdn @LPOFrance @PNBancarguin @WGLepelaar @GRUSEC

autorenew 2favorite 8
Photo of a Shiba Inu

#SIBES stands for 'Synoptic Intertidal Benthic Surveys'. It is both a CONCEPT & many PROJECTS. E.g. every year @NIOZnieuws covers the entire Dutch #WaddenSea in a grid-based benthic survey. Great to see the concept applied in #SIBES_Formosa
& see intro at:

autorenew 2favorite 8
Photo of a Shiba InuPhoto of a Shiba Inu

In #migration from Guinea-Bissau to Iberia, having passed @PNBancarguin & Canary Islands, black-tailed #godwit SLINKEWEI made a U-turn to the coast of Morocco... Checking the #winds on 19 January shows it was facing head-winds of 50 km/hr. Fingers crossed!

autorenew 4favorite 18
Photo of a Shiba Inu

ANIMAL CULTURES are a reality, but so far receive privileged acknowledgement for some charismatic mammals & the 'smart' birds (parrots & corvids).
Book on #SINAGOTE (a female #spoonbill) & friends, implies how #waterbirds also love, learn & work together.

autorenew 4favorite 5
Photo of a Shiba InuPhoto of a Shiba Inu

Wat een ongelooflijk rijke compilatie aan gegevens en verhalen en geschiedenissen over vogels, vogelmensen & biotopen in Zeeland! Gefeleciteerd noeste werkers. Heel leuk om hier en daar 'snippets' uit werk van @GlobalFlyway tegen te komen, zoals geringde 3teen & kanoet TenAlloul.

autorenew 1favorite 9
view older tweets