The principal characteristic of the mink in comparison with its congeners is its amphibious mode of life.
The last scene of all is a vast amphibious wilderness of swamp and forest, amid whose solitudes their network of channels insensibly merges into the sea.
The conclusion arrived at on that occasion had, however, been that, whether the campaign were to take the form of a purely naval operation or whether the task were to be performed by an amphibious expeditionary force, the enterprise was bound to prove most difficult.
There are deer in the forests and on the open savannahs, the rabbit and squirrel are to be seen on the eastern slopes of the Andes, and partly amphibious rodents, the "capybara" (Hydrochoerus) and "guagua" (Coelogenys subniger), are very numerous along the wooded watercourses.
His theory is that in the early Cretaceous epoch the animals of the world were mostly aerial, amphibious, aquatic or arboreal; the flora of the land being undeveloped as compared with its present state.
Gulls and amphibious birds abound in large variety; three kinds of penguin have their rookeries and breed here, migrating yearly for some months to the South American mainland.
Of the principal families, the Acanthopterygii, which are abundant in the hotter parts of India, hardly enter the mountains, two genera only being found, of which one is the peculiar amphibious genus Ophiocephalus.
A very prolific rodent of the amphibious class obtained from Canada and the United States, similar in habit to the English vole, with a fairly thick and even brown underwool and rather strong top dark hair of medium density.
The rodents are numerous and include most, if not all, of the Amazonian species - the capybara (Hydrochoerus capybara), cavia (C. aperea), paca (Coelogenys paca) and cutia (Dasyprocta aguti), all amphibious and having an extensive range.
The single genus (Isoetes) contains about fifty, mostly aquatic, species, though a few are amphibious or terrestrial.
Of the amphibious rodents, the pi-ea (Cavia aperea), mod, (C. rupestris), paca (Coelogenys paca), cutia (Dasyprocta aguti) and capybara (Hydrochoerus capybara) are noteworthy for their size and extensive range.