The effect of drought on bird migration through southern portugal

Abstract

During 1992 the southern Iberian peninsular experienced the most severe drought this century. Data from both ringing studies and records of food production at a study site in the Algarve district of Portugal are examined in an attempt to explain the noticeable reduction in the numbers of birds ringed during 1992 as against the previous five years. © 1993 Taylor & Francis Group, LLC.