| Many animals and insects that taste awful, sting or can otherwise turn a good day sour have adapted this warning-label strategy, known as aposematic coloration. |
| Clusters amplify the signal of aposematic coloration, and individuals may participate in group regurgitation or displays. |
| These include various lepidopterans and the African grasshopper, which adopt aposematic coloring as a warning. |
| Rattlesnakes shake their tail rattles as aposematic warnings. |
| Additionally, taxonomically troubling taxa such as Crataegus makes identification and quantification of aposematic species extremely difficult. |
| Experimentation has shown that certain birds and mammals, at least, are capable of acquiring and retaining knowledge of some aposematic mechanisms from a single experience. |
