Plenty of poets wrote them, but the most famous of all is John Milton's  Lycidas . Like all typical pastoral elegies, Milton mourns the loss of his best bud (who died in a shipwreck). But he also compares him to a shepherd and describes the ways in which nature mourns his loss, too.
The Banff longnose dace, a small minnow, was recently declared extinct. It failed to compete with the guppies, swordtails, sailfin mollies and other tropical fish that had been released in the warm marsh below the famous hot springs by tourists and national park officials.
Diplodocus lived some 147 to 150 million years ago. The word Diplodocus is a Neo-Latin word and it means double beam. Its double beam chevron bones were located under its tail. Hence the name was given to this species. The web defines it as long necked and tailed herbivore.