Some urban birds modify their songs to make themselves heard amidst the noise and chaos of cities. Sometimes the changes are so great that some of them are unable to communicate with individuals of the same species. These are the results of a study carried out over eight years with different passerine birds in Spain and Brazil.
Although until now it was thought to be an Indonesian fish (Paedocypris progenetica) measuring 8 millimeters, a team of researchers from Louisiana State University has discovered a new species that surpasses this mark. How tall exactly?
To the uninitiated, they are practically identical, and they also have very similar geographic distributions. We refer to two butterflies of the genus Pyrgus that, despite all their similarities, hide very different evolutionary histories.
Going outside helps improve concentration, even when it's cold, according to research from the University of Michigan published in Psychological Science. Walking in the field or taking a walk in a park, whether it is hot or cold, increases memory and attention improves by 20 percent after an hour of interaction with nature.
A Spanish investigation has analyzed the data on abuses of animals in the last decade in Castilla y León, verifying that they have increased gradually in recent years, and that roe deer, wild boar and deer are the species that star in the majority of collisions with vertebrates, which increase in autumn.
An image of the Spanish Daniel Beltrá, who collects a group of pelicans covered in oil due to the spill in the Gulf of Mexico, has won the first prize of the 47th edition of the nature photography contest 'Environment Wildlife Photographer of the Year' .
The gentoo harriers can travel more than 8,000 kilometers on their migrations from Kazakhstan to regions as distant as West Africa or India. During this migration, which takes them to such disparate ranges, these raptors fly about 250 kilometers a day in search of a place to spend the winter cold.
Me or no one else. This seems to be the motto of the male cabbage caterpillar or Pieris brassicae, an insect that lives in Europe and North Africa. During copulation, the male deposits an antiaphrodisiac substance, benzyl cyanide, on his beloved.
Danni Büchner is invited to Sam Dylan's Halloween party. But the "Goodbye Germany" emigrant has no desire for many other party guests. And find clear words.
