The endangered Cantabrian capercaillie (Tetrao urogallus cantabricus) has undergone a severe decline during recent decades.
"There is insufficient evidence that the species has undergone a marked decline in population size in the wild large enough".
The population of eastern hellbenders (Cryptobranchus alleganiensis alleganiensis) in the Blue River, Indiana has undergone a dramatic decline over the last decade.
Unfortunately, West Indies cricket has undergone a steady decline over the last 10 years, but there are signs that the current team is capable of lifting them out of the doldrums.
Theft, generally speaking, has undergone a long decline in the UK in recent decades.
In the Rhone-Alps region, its population has undergone a sizeable decline since the 1990s, largely as a consequence of poisoning campaigns against muskrats.
The leatherback turtle (Dermochelys coriacea) has undergone a dramatic decline over the last 25 years, and this is believed to be primarily the result of mortality associated with fisheries bycatch followed by egg and nesting female harvest.
Since the global financial crisis in 2009, however, the manufacturing sector has undergone a rapid decline.
Specifically, Okanagan Lake kokanee has undergone a dramatic decline in abundance in recent decades owing to several concurrent anthropogenic factors including spawning habitat degradation, competition with introduced species, declines in nutrient loading, and angler impact (Shepherd 2000).
The gharial has undergone a chronic long-term decline, combined with a rapid short-term decline, leading the IUCN to list the species as Critically Endangered.
Media freedom has undergone a "deep and disturbing" decline in several parts of the world and at the global level this year, according to a new release from Reporters Without Borders.
