was studied during 1978 and 1979 in a 52 mx 36 m study plot located in the Belgian
national nature reserve" de Kalmthoutse heide"(Kalmthout (51025'N-4025'E), province of
Antwerp, Belgium). The vegetation of the study plot is characteristic of moist heathland.
Lizards were sampled daily, weather permit-ting, from 1 March-i1 Oct. 1978 and from 1
March through Oct. 1979. Sampling days were grouped into half-monthly intervals. During …