I've found Poland wonderful for bird life -- though I'm in any case, pretty much comprehensively "sold" on Poland in general. Particularly good fun in the stork-summering-and-breeding season, late spring / most of the summer (and the locals love the storks, and put up elevated nesting-platforms for them) -- in the countryside in the season, storks all over the place, doing their thing. Have also seen cranes -- close-to, from a train -- in western Poland.
I admit to being a bit funny in the head about these matters: by all rational and linguistic-sense-making canons, regular day-by-day steam shunting activities are the real thing -- just, I irrationally feel that steam locos out on the line, regularly and copiously hauling trains, are really "what it's all about". A number of countries, after they had ceased to use steam for regular line working, for a fair while kept it in some strength, purely for shunting. That was stuff which I never wished to go to see: it just felt for me, such a miserable and ignominious come-down and "antechamber to death", for the survivors of the country's steam fleet. Shunting by steam can indeed be, in itself, a fine spectacle: in Zimbabwe in 1991, I revelled in watching it at Bulawayo; with there still being there at that time, plentiful steam line working, which I also experienced.