… of the immune system to certain foreign substances (allergens). They are the most common chronic diseases in Germany and thus a relevant public health issue. The most common triggers of allergies in Germany are pollen from early-blossoming trees such …

… breeding starts earlier. An earlier start of egg laying and breeding has been documented for the long-distance European pied flycatcher (Ficedula hypoleuca) , … change, returning too late when caterpillars are scarce. Source: OhWeh / Wikimedia Commons; CC BY-SA 2.5 The wall brown butterfly is a thermophilic species which …