We created experimental patches with one, two or three sizes of seeds, and recorded the number of species, and numbers of individuals of each species of birds exploiting the seeds in winter. Bird ...

Halfway down the east slope of the Andes in Ecuador, sightings of the luminous yellow beaks of the chestnut-mandibled toucan are abruptly replaced by the colorful beaks of the white-throated toucan.

Embryo rescue technique is widely utilized to save developing embryo from abortion in interspecific hybridization of plants. In Brassica species, success of an embryo rescue depends on the age of ...