Attributes / relations provided by
♦ ¹COMMUNAL ROOSTING AND DIET OF BLACK-SHOULDERED KITES (ELANUS CAERULEUS) WINTERING IN SOUTHWESTERN SPAIN, Deseada Parejo, Jesús M. Avilés, Juan J. Ferrero, Domingo Rivera and José M. Casas, J Raptor Res. 35(2):162-164 (2001)
♦ ²Correlates between morphology, diet and foraging mode in the Ladder Snake Rhinechis scalaris (Schinz, 1822), Juan M. Pleguezuelos , Juan R. Fernández-Cardenete , Santiago Honrubia , Mónica Feriche , Carmen Villafranca, Contributions to Zoology, 76 (3) – 2007