Extinction risk and different levels of threat
Have you ever noticed the expressions “vulnerable”, “endangered” or “extinct in the wild” which are associated with some species? The loss of biodiversity has made it more common to hear these classifications. Learn about the categorisation created by the International Union for Conservation of Nature, its meaning and importance in determining a species’ extinction risk.
Many Portuguese will never have seen an Algerian Oak, and it’s easy to understand why: there are thought to be only around 300 in Portugal, an estimate that led the Red List of Vascular Flora of Mainland Portugal to classify it in one of the most worrying conservation categories – that of Critically Endangered Species.