Recuperaciones por condición para Ánade friso

Game species in some European countries. Most encounters are obtained from the mid-1970s to 1991 and after 2004. The encounters are almost equally spread throughout the year, except for the period Mar-May which produced the lowest number of them; a single peak is evident in Jan (ca. 15% of all encounters). NW Europe holds the bulk of encounters (37%), followed by W and C regions (ca. 19% each). The encounters based on dead birds (mostly as a result of shooting/ hunting) fluctuated over time (49% pre-1960, 82% in 1961-1990, and 34% after 1991), while those based on alive birds – markedly increased (from 4% pre-1960 to 65% after 1991). The latter is largely due to ringing recoveries and identification from a distance (wing tags) – coming mostly from W & C Europe.

Movimientos anuales para Ánade friso

The breeding grounds are left by males in early Jul, preceding the females and young about a month (Scott, Rose, 1996). The species undergoes a flightless wing-moulting period in late summer at suitable locations (Leschack et al. 2020) – moulting concentrations are known from W & C Europe and Volga Delta, before the birds continue to their wintering grounds (Scott, Rose, 1996).

Autumn movements take place as early as Sep, mostly in Oct-Nov; the final wintering sites are usually reached by Dec. Small number of encounters exists from coastal wetlands in N Africa between Nov and Feb. Return movements in spring take place mostly in Mar-Apr. Single birds remain in their wintering areas until May.

Although the timing of the breeding season varies geographically the species typically nests later than other Anatini (Leschack et al. 2020).

Conectividad por mes por región para Ánade friso

Males, non-breeding females and failed breeders perform moult migrations starting from mid-summer; the successfully breeding females moult near brood-rearing areas (Leschack et al. 2020). Satellite tagging of birds from a moulting location to an autumn staging site in C Europe revealed multidirectional movements (Gehrold et al. 2014). Autumn migration is evident from the start of the season but is more intensive mid- to late autumn. The wintering grounds are normally occupied in early winter. Some birds overwinter as far S as N Africa and Tigris-Euphrates river system. Return migration takes place mostly early- to mid-spring, the breeding sites in the extreme N of species range can be reached in late spring (Noskov et al. 2016).