Aron Tanti

Small, all black tern breeding colonially in well-vegetated fresh or brackish wetlands. Disjunct breeding range in W Europe, has declined greatly in W Europe due to habitat destruction and eutrophication (Beintema 1997). More common in E. Europe, range also includes W Asia and N America. Strongly migratory, travelling both at sea and over land. European birds winter Africa. Diet predominantly insects. Nest built in shallow water or floating on aquatic vegetation. Gathers in large flocks during post-breeding period. European population estimated at 74,400-154,000 breeding pairs, decreasing.

Season of assessment

B

Population trendUnknown
Population size
(min-max, best estimate)		225000-355000,280000
Red List categoryLC
Franks, S., Fiedler, W., Arizaga, J., Jiguet, F., Nikolov, B., van der Jeugd, Ambrosini, R, Aizpurua, O., Bairlein, F., Clark, J., Fattorini, N, Hammond, M., Higgins, D, Levering, H., Skellorn, W., Spina, F, Thorup, K. Walker, J., Woodward, I. and Baillie, S.R. (1) (2022) Online Atlas of the movements of European bird populations. https://migrationatlas.org EURING/CMS (1) Principal investigator
Carte

Connectivité globale pour Guifette noire

Movements strongly WSW oriented in Europe and from W Asia to Europe, then SW to African wintering grounds. NW and W European birds moving SW. Many birds gathering at Lake IJsselmeer, Netherlands before S migration, birds with more E origin travel through Italy. Main wintering sites in Senegal, Gulf of Guinea, and Namibia. A geolocator study revealed stopovers in W Mediterranean and Mauretania. Autumn migration followed Atlantic coast, spring migration can involve crossing Sahara over land (van der Winden et al. 2014).

Contrôles par Condition for Guifette noire

More than one-third of re-encounters are ring recoveries, mainly from the Netherlands, Germany, Sweden and Italy, some also W Africa. Most are from after 1960. Another one-third are birds that were identified by other means, e.g. colour rings, which have been applied widely in the Netherlands, Germany and Poland, where also most of the recoveries are from. About a quarter of the recoveries are from shot birds, occurring in Spain, Italy, SE and E Europe and Russia. Just two birds were reported shot after 1990.

Annual Movements for Guifette noire

Virtually all recoveries in Africa from mid Oct - Mid Mar. First birds in Italy begin Apr, mass arrival end Apr, then also first birds appear elsewhere in Europe. Birds moving NE through Europe to Baltic, Fennoscandia, Russia through May and begin Jun. No recoveries in Africa from end May to end Aug. Concentrations in all breeding areas in Jun-Jul, by end Jul Fennoscandia vacated, concentration in Netherlands mid Aug, still scatter of recoveries over wide range in Aug, but rapid decline in Sep, with just few recoveries in Spain and Italy end Sep, begin Oct. By end Oct all birds back in Africa.

Connectivité par mois par région pour Guifette noire

Birds in Apr-May in W Europe show only local movements, birds in W Europe in Jun-Oct nearly all on Lake IJsselmeer, Netherlands, connecting to breeding sites in C Europe, S Sweden, S Finland, Baltic and W Russia in May-Jul, to S France and Iberia in Aug-Oct, and from there on to Mauretania Sep-Nov, and to Gulf of Guinea or Namibia Oct-Mar. Again Mauretania in Apr-May, some connections to Italy Apr-May, suggesting loop migration. Birds in N Italy in spring Apr-May connect to Senegal Sep-Nov or Gulf of Guinea in Oct-Apr and on to E Europe and W Asia in May-Sep. Fewer birds in Jun-Sep showing large scatter in connections. Very few connections straight from breeding grounds to Africa, nearly all via IJsselmeer or Italy.

Références

Statistiques Carte
Nombre de données Nombre d'individus Nombre de contrôles
Données cartographiées*
Données totales disponibles
*Données cartographiées avec des contrôles >= à 50 km
Références Carte
Beintema, A.J.1997 . European Black Terns (Chlidonias niger) in Trouble: Examples of Dietary Problems. Colonial Waterbirds 20: 558–565
van der Winden, J., Fijn, R. C., van Horssen, P. W., Gerritsen-Davidse, D., Piersma, T.2014 . Idiosyncratic migrations of Black Terns (Chlidonias niger): Diversity in routes and stopovers. Waterbirds 37: 162–174

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