Female birds age more slowly and live longer when they have help raising their offspring, according to new research from the University of Sheffield.
Seychelles warblers live and breed in family groups on the tiny island of Cousin. In each group, a dominant female and male reproduce. When helpers assist the with incubation and feeding of chicks, the dominant female breeders age more slowly and live longer, a study by biologists from the University of Groningen and colleagues shows. The results indicate how cooperative breeding -- which also occurs in other species, including humans -- can increase life span.
Male and female serial killers tend to choose their victims and commit their crimes in different ways, which may be due to thousands of years of psychological evolution, according to researchers.
A team of scientists led by Alida Bailleul and Jingmai O'Connor from the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences reported the first fossil bird ever found with an egg preserved inside its body. This new Cretaceous fossil sheds light on avian reproduction.
Coyotes eat deer, but not enough to limit the deer population at a large scale. A new study of deer numbers across the eastern United States has found that the arrival and establishment of coyote predators has not caused the number of deer harvested by hunters to decline.
People from North Africa are likely the main group that founded the indigenous population on the Canary Islands, arriving by 1000 CE, reports a new study by Rosa Fregel of Stanford University, USA and Universidad de La Laguna, Spain, and colleagues, published March 20, 2019, in the open-access journal PLOS ONE.
A new species of Surazomus, which belongs to the class Arachnida and the order Schizomida, has been discovered in the eastern Amazon, according to a study published March 20 in the open-access journal PLOS ONE by Gustavo Ruiz and Roberta Valente of the Universidade Federal do Pará in Brazil.
The study of evolution is revealing new complexities, showing how the traits most beneficial to the fitness of individual plants and animals are not always the ones we see in nature. Instead, new research by McMaster behavioural scientists shows that in certain cases evolution works in the opposite direction, reversing individual improvements to benefit related members of the same group.
Natural selection predicts that mutualisms -- interactions between members of different species that benefit both parties -- should fall apart. Individuals that gain from the cooperation of others but do not reciprocate (so-called cheaters) should arise and destabilize mutualisms. Yet to date, surprisingly little evidence of such cheating or destabilization exists. A team of biologists at the University of California, Riverside, has now found strong evidence of this cheating.
When nutrients are dangerously low, a group of bacteria have been found to take the drastic measure of getting rid of their tails.