Michele Mendi

Discontinuous breeding distribution from Finnmark to eastern Siberia. Western populations mainly winter in central and south-east Europe, in countries bordering the European coasts of the Black Sea. Far eastern Siberian populations winter in Japan and China. Reinforcement efforts in northern Europe with a new migration flyway to the lower countries.

Season of assessment

B

Population trendDecreasing
Population size
(min-max, best estimate)		340-530,420
Red List categoryVU
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
Mapa

Conectividad global para Ánsar chico

There are two main flyways for the species. Relict/reinforced populations breeding in Scandinavian highlands migrate to the lower countries, especially polders in Germany and the Netherlands (Aarvak et al. 2003; Lorentsen et al. 1998). Eastern breeders move to steppes of central Europe, especially Bulgaria and Hungary. Birds from Siberian Russia migrate to the SW and have been recovered wintering on the Caspian shores of Azerbaijan. The general movements therefore follow a north-south direction. No age-specific migration strategies, as expected from species undergoing fall familial migration. No ringing effort before the 1960s hence no old recovery.

Tracking data on Movebank concern birds breeding or released in Sweden and Finnmark (Aarvak et al. 2003; Lorentsen et al. 1998).

Recuperaciones por condición para Ánsar chico

Most recoveries obtained from visual resightings of colour marked individuals (~90%), even for the 1960-1990 period, but still some dead recoveries even in the recent period (6.5%).

Movimientos anuales para Ánsar chico

There is not a lot to extract from less than 100 winter recoveries of mainly captive-bred and released individuals, beyond the general pattern described in the connectivity by month. There are a few records of Scandinavian birds moving to the east in the fall migration, recovered in Russia (Krasnodar) and even Kazakhstan. There are very few re encounters of ringed birds, most being of juveniles in the North and during the summer, so linked to reinforcement schemes. The natural annual movements of the species might be better understood from tracking mature individuals.

Conectividad por mes por región para Ánsar chico

Very few ring recoveries to document the overall temporal connectivity pattern. Most recoveries in the Netherlands are from November to February. Birds of North Europe are still on the winter quarters in March, on the move in April and arrive on breeding grounds in May, while they return to the wintering sites in September and October.

Referencias

Estadísticas Mapa
Nº de registros Nº de individuos Nº de recuperaciones
Datos en el mapa*
Total de datos disponibles
* Los datos del mapa incluyen solo recuperaciones lejanas (>= 50 km)
Referencias Mapa
Aarvak, T., Øien, I.2003 . Moult and autumn migration of non-breeding Fennoscandian Lesser White-fronted Geese Anser erythropus mapped by satellite telemetry. Bird Conservation International 13 Link to Article (DOI: https://doi.org/10.1017/S0959270903003174) : 213–226
Lorentsen S-H, Øien IJ, Tomas Aarvak T1998 . Migration of Fennoscandian lesser white-fronted geese Anser erythropus mapped by satellite telemetry. Biological Conservation 84 Link to Article (DOI: https://doi.org/10.1016/S0006-3207) : 47–52

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