Wednesday, March 20, 2013

Risso's dolphin


Unlike the movies we watch, where there are very good characters good and bad characters are terrible, in nature, no animal is good and much less bad. Maybe us by our culture, we tend to classify among good and evil. For example, it is difficult to see how an animal "bad", a cow. But is easy to see how "bad" a tiger (as in the cartoon film Kung Fu Panda).

If you're going to sea, we usually see as "good" to dolphins and "bad" to the orcas. So possibly we head will explode when we know the Risso's dolphin(Grampus griseus). A good bad but very good ...dolphins ... bufff

These dolphins live in groups of up to 100 individuals. They are of dolphins there largest measuring up to 4 meters (14 ft)  and weigh 600 kg (1430 lb). Its way of relating is very similar to the orcas, in fact even as they hunt. Orcas are also known as killer whales, because they often hunt other whales. Well, the Risso's dolphin  also hunt whales, hunt whales not only inoffensive, but also other whales which are considered the world's greatest predators: the sperm whale. The sperm whale has the size and strength, Risso's dolphin  has the number and intelligence.

Another thing that strikes the Calderon is using the ecolocatitation. This will help to "see" what is in the sea and to communicate with other congeners Sometimes this ecolización (not sure why) fails and leaves dozens of people stranded on beaches. Many die.

Currently, this "naughty or nice" but intelligent dolphin is endangered. Risso's dolphin is caught indiscriminately sometimes unintentionally. What is not is the cruel slaughter involuntary that make this animal each year off the coast of Denmark.

Wednesday, March 13, 2013

Army ants... the marabunta.

Somewhere in the vast West Africa, we find a dangerous ant species, invasive and jackets. Tiny superpredator able to hunt animals much larger than themselves, their greed and their numbers are your best weapons. The name are army ant or legionary ant or marabunta.



In the hunt for their prey moving such as fast army. Primarily come first workers and a few first soldier ants. They arrive at an area and begin to work to build a nest, and building underground the terrain characteristics. When part of the anthill built, start the hunting, the search for food. Right now divide and hunt any animal that is near. They are able to hunt insects bigger than them, but they have also been seen hunting small mammals including mice and has even been documented to have been able to attack and hunt chickens when they were in cages.

Once the clean area of potential nest predators and with almost built, start the transfer from the old nest. (Impressive organizational capacity) Queen, all worker ants and ant larvae and, now, all the soldiers prepared to prevent any possible attack, begin to move into their new nest. Moving home can last up to three days, and if we can lift up to 25 kg to work, they lift up to 300 kg (in proportion) to work building the nest or carrying larvae.



In the new ant they will stay for about a month. When the area is not enough food will change. Meanwhile, any animal that falls into the area of action Siafu ants will die.