Sandwich Tern Feeds Juvenile on Wintering Grounds in Southern Namibia

Fijn, Ruben C.; Bemmelen, R.S.A. van

doi:10.5253/arde.2023.a2

Ardea

2023

DOI: 10.5253/arde.2023.a2

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Sandwich Tern Feeds Juvenile on Wintering Grounds in Southern Namibia

Ruben C. Fijn¹,

R.S.A. van Bemmelen

Abstract: The duration of parental care varies widely among bird species. The crested terns Thalasseus spp. continue to feed their chicks at least sporadically for several months after fledgling. We recorded provisioning of a juvenile Sandwich Tern T. sandvicensis by its suspected parent at the wintering grounds in southern Namibia, more than 10,000 km away from the nearest breeding site and more than six months after fledging.

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Highly pathogenic avian influenza causes mass mortality in Sandwich tern (Thalasseus sandvicensis) breeding colonies across northwestern Europe

Knief,

Bregnballe,

Alfarwi

et al. 2023

Preprint

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In 2022, highly pathogenic avian influenza (HPAI) A(H5N1) virus clade 2.3.4.4b became enzootic and caused mass mortality in Sandwich terns and other seabird species across northwestern Europe. We present data on characteristics of the spread of the virus between breeding colonies and the number of dead adult Sandwich terns recorded at breeding sites throughout northwestern Europe. Within two months after the first mortalities were reported, in total 20,531 adult Sandwich terns were found dead, which is >17% of the total northwestern European breeding population. Losses are likely higher, as we expect that many victims were not found (mortality rate might be up to 74% of the breeding population). Inside the colonies almost all chicks died. After the peak of the outbreak, in a colony established by late breeders, 25.7% of adults showed immunity against HPAI subtype H5. Removal of carcasses helped in reducing the spread of the disease and consequently total mortality. More research on the sources and modes of transmission, incubation times, effective containment and immunity is urgently needed to combat this major threat for colonial seabirds.

show abstract

Highly pathogenic avian influenza causes mass mortality in Sandwich tern (Thalasseus sandvicensis) breeding colonies across northwestern Europe

Knief,

Bregnballe,

Alfarwi

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

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Sandwich Tern Feeds Juvenile on Wintering Grounds in Southern Namibia

Cited by 1 publication

References 47 publications

Highly pathogenic avian influenza causes mass mortality in Sandwich tern (Thalasseus sandvicensis) breeding colonies across northwestern Europe

Highly pathogenic avian influenza causes mass mortality in Sandwich tern (Thalasseus sandvicensis) breeding colonies across northwestern Europe

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