Endothermy is really a synapomorphy from the Mammalia, even though it could have arisen in a (now extinct) synapsid ancestor; the fossil file does not distinguish these opportunities. Convergent in birds. Their inclination to build huge nests in which they rear their youthful alongside one another symbolizes the Exclusive intimacy https://franciscokf72y.blogocial.com/what-does-stork-mean-62634913