Higher survival of an aposematic than of a cryptic form of a distasteful bug

  title={Higher survival of an aposematic than of a cryptic form of a distasteful bug},
  author={Birgitta Sill{\'e}n-Tullberg},
An experiment was performed to assess the relative survival of two forms of 5th instar larvae of Lygaeus equestris (Heteroptera, Lygaeidae) — the normal red form, called aposematic, and a mutant grey form, called cryptic — when given to hand-raised great tits (Parus major). Sixteen birds were presented with aposematic larvae and 16 were presented with cryptic larvae in 10 consecutive trials. One attack per trial was allowed. Both larval forms were presented against a background matching the… CONTINUE READING

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