Kačer kopřivky. Tím zbarvením jsou to hodně nenápadné kachny. Taková samice vypadá na první pohled jako samice kachny divoké, ale jarní přepeřený kačer je fešák.
The drake gadwall. Their coloring makes them very inconspicuous ducks. Such a female looks like a female mallard at first glance, but the spring feathered duck is handsome.
https://www.inaturalist.org/observations/43651220
https://www.inaturalist.org/taxa/558439-Mareca-strepera
18.4.2020 South Bohemia, Czech republic
I always look first at the Czech name of the animal in the title of Your post and try to guess what it will be in Polish. Today it was very difficult, because in Polish it is 'krakwa'. :)
It could be a tricky business 😁
Like polák velký. :)