A bird associated with the beginning of spring? The song of the swallow not only heralds the arrival of this season, but also consists of a kind of very rapid musical chatter/trill that usually ends in a "su-seer," where...
Bats are quite unique mammals as they are characterized by being the only ones that can fly or share their shelter with millions of individuals of the same species. However, like many other species, they are in serious danger...
