Juan José Sanz Cid

Juan José Sanz Cid is a Spanish ornithologist and ecologist at the Museo Nacional de Ciencias Naturales. In 2000 Sanz-Cid along with Santiago Merino, Juan Moreno, and Elena Arriero had studied Eurasian blue tit and its infection by avian blood parasites such as H. majoris and L. majoris. In 2004 he along with Christiaan Both had proved that climate change makes birds to lay eggs earlier by studying flycatchers of Ficedula genus.