As species within the same taxonomic group often have similar ecological requirements and may pose similar risks, the inclusion of taxonomic groups of species on the Union list should be allowed, where appropriate.
Toisc gur minic a bhíonn na riachtanais chéanna éiceolaíocha ag speicis laistigh den ghrúpa tacsanomaíoch céanna agus toisc go bhféadfadh sé go mbeadh an riosca céanna ag baint leo, ba cheart, i gcás inarb iomchuí, go gceadófaí go n-áiritheofaí grúpaí tacsanomaíocha speiceas ar liosta an Aontais.