摘要：A study on the trophic spectrum of three species of lacertid lizards (Lacerta agilis,Lacerta trilineata and Podarcis muralis) was carried out, based on 20 specimenscollected in the period 1967-1973 in various localities in Bulgaria. The analyzeddata showed that the insects (Insecta) are the most numerous and the mostfrequently met among the alimentary components of the total amount of food ofthe studied stomachs (except for Lacerta agilis, where spiders are slightlypredominating). The non-insect components consisted spiders and isopods. Thelargest niche breadth was recorded in Lacerta trilineata (8.25), followed byPodarcis muralis (5.20) and Lacerta agilis (3.44). The niche overlap between thethree species (pair-wise comparison) showed medium values and in our opinionthere should not be any serious competition for food resources at the places withsympatric distribution
