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Northward migration of Red Knots Calidris canutus rufa and environment connectivity of southern Brazil to Canada

Published online by Cambridge University Press:  16 January 2024

Antônio Coimbra de Brum Open the ORCID record for Antônio Coimbra de Brum [Opens in a new window] ,
Júlia Victória Grohmann Finger Open the ORCID record for Júlia Victória Grohmann Finger [Opens in a new window] ,
Richard G. Lathrop Jr ,
Stephanie Feigin ,
Joseph Smith ,
Lawrence Joseph Niles  and
Maria Virginia Petry Open the ORCID record for Maria Virginia Petry [Opens in a new window]
Antônio Coimbra de Brum
Affiliation:
Universidade do Vale do Rio dos Sinos, Unisinos, São Leopoldo, RS, Brazil
Júlia Victória Grohmann Finger
Affiliation:
Universidade do Vale do Rio dos Sinos, Unisinos, São Leopoldo, RS, Brazil
Richard G. Lathrop Jr
Affiliation:
Rutgers University, New Brunswick, NJ, USA
Stephanie Feigin
Affiliation:
Wildlife Restoration Partnerships, Greenwich, NJ, USA
Joseph Smith
Affiliation:
Wildlife Restoration Partnerships, Greenwich, NJ, USA
Lawrence Joseph Niles
Affiliation:
Wildlife Restoration Partnerships, Greenwich, NJ, USA
Maria Virginia Petry*
Affiliation:
Universidade do Vale do Rio dos Sinos, Unisinos, São Leopoldo, RS, Brazil
*
Corresponding author: Maria Virginia Petry; Email: vpetry@unisinos.br
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Summary

During their northward migration, Red Knots Calidris canutus rufa stop at the Lagoa do Peixe National Park in the extreme south of Brazil to build up fat reserves for their journey to their Canadian breeding grounds. We tracked five Red Knots with PinPoint Argos-75 GPS transmitters to investigate differences in migration strategies from this stopover. Tracked birds used two different routes: the Central Brazil route and the Brazilian Atlantic Coast route. One bird flew 8,300 km straight from Lagoa do Peixe to the Delaware Bay (USA). Another bird stopped in Maranhão (north-east Brazil) and a third one used a yet unknown environment for the species, the mouth of the Amazon River at Baía Santa Rosa, Brazil. These two birds made short flights, covering stretches of 1,600 km to 3,600 km between stop-overs, where they stayed from 4 to 18 days. Our study highlights the occurrence of intrapopulation variation in migratory strategies and reveals the connectivity of environments that are essential for the viability of rufa Red Knot populations.

Keywords

MonitoringNearcticRouteShorebirdsTracking
Type
Short Communication
Information
Bird Conservation International , Volume 34 , 2024 , e2
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of BirdLife International

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