Knowing approximately how many individuals of a certain species are out there is important for bird conservation efforts, but raw data from bird surveys tends to underestimate bird abundance. The researchers behind a new paper from The Condor: Ornithological Applications tested a new statistical method to adjust for this and confirmed several mathematical tweaks that...
Color vision makes birds of prey successful hunters
In many cases it is the colour of the prey that helps predatory birds to detect, pursue and capture them. In a new study, biologists at Lund University in Sweden show that the Harris's hawk has the best colour vision of all animals investigated to date -- and in certain situations, even better than humans....
Beavers have an impact on the climate
Growing beaver populations have created a large number of new habitats along rivers and ponds. Beaver dams raise the water level, enabling the dissolution of the organic carbon from the soil. From beaver ponds, carbon is released to the atmosphere. Part of the carbon settles down on the bottom, ending up used by plants or...
Goats prefer happy people
Goats can differentiate between human facial expressions and prefer to interact with happy people, according to a new study led by scientists at Queen Mary University of London.
The study, which provides the first evidence of how goats read human emotional expressions, implies that the ability of animals to perceive human facial cues is not limited...
New phase proposed in the relationship between figs and wasps
In an article published at journal Acta Oecologica, Brazilian biologist Luciano Palmieri Rocha has proposed a new phase of the development cycle of fig trees (Ficus carica) and their specific pollinators, fig wasps from the species Blastophaga psenes - one of the most studied cases when analyzing the evolution of mutualism.
According to Palmieri, the cycle's...
Remote islands harbor higher numbers of non-native species
The effects of island remoteness from the mainland on the number of species found on islands differs strongly for non-native compared to native species. Numbers of native species on islands decrease with greater remoteness, while numbers of non-native species increase. This surprising finding has been uncovered by an international research team led by Dietmar Moser,...