R. Yosef et al., CONTRASTING REACTIONS OF LOGGERHEAD SHRIKES TO 2 TYPES OF CHEMICALLY DEFENDED INSECT PREY, Journal of chemical ecology, 22(2), 1996, pp. 173-181
Feeding tests with loggerhead shrikes (Lanius ludovicianus) showed thi
s bird to accept Utetheisa ornatrix, a moth (Arctiidae) protected by p
yrrolizidine alkaloids, but to avoid Lytta polita, a beetle (Meloidae)
containing cantharidin.