How is a rare species defined?

A rare species is defined as a group of organisms that are very uncommon, typically having low abundance or limited distribution in a given area. This designation can arise due to various factors such as habitat loss, environmental changes, or specific ecological requirements that make the species vulnerable to extinction. Rare species may occupy niche habitats or have specialized needs that restrict their presence to specific geographic locations or ecosystems.

The concept of rarity is also linked to conservation efforts, where identifying rare species is crucial for implementing strategies to protect them and their habitats. The rarity of a species can indicate an imbalance in the ecosystem, highlighting the importance of preserving biodiversity.

In contrast, the other options describe characteristics of common species or those that are stable or widespread, which do not align with the definition of rarity in ecology.