Spotted flycatcher the cuckoo, but became so good at recognising the intruder's eggs that it ceased to be victimised. A contrast to this is the dunnock, which appears to be a recent cuckoo host, since it does not show any egg discrimination. A study conducted at two different locations in southern England found that one third of nests were predated. The Eurasian jay ("Garrulus glandarius") was the most common aerial predator, consuming both eggs and chicks. The domestic cat ("Felis catus") predated a small fraction of the nests. Spotted flycatcher The spotted flycatcher ("Muscicapa striata") is a small passerine bird in the
Everything which is not forbidden is allowed forbidden is compulsory." This quote has been suggested as a principle of physics. The claim that “everything which is not fobidden is allowed” is a principle only of English law does not stand the test of reality. In fact, it is a common principle of liberal democracies. In Germany, it has constitutional rank under Art. 2(1) of the GG which protects the general freedom to act (Allgemeine Handlungsfreiheit), as demonstrated e.g. by the judgment of the Bundesverfassungsgericht known as “Reiten im Walde” (BVerfGE 80, 137). Everything which is not forbidden is allowed "Everything which is not forbidden is allowed" is