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.

1. Although competition for pollination is often invoked as a driver of broad-scale evolutionary and ecological patterns, we still lack a clear understanding of the mechanics of such competition. When ...

1. Animals may anticipate and try to avoid, at some costs, physical encounters with other competitors. This may ultimately impact their foraging distribution and intake rates. Such cryptic ...

I AM glad that Drs. Andrewartha and Browning have been able to go some way with me. I hope that the following remarks will help them to travel further. The example of the car was used as an analogy, ...

Scientists successfully employed mutagenesis to identify the gene that causes hybrid sterility in rice, which is a major reproductive barrier between species. Scientists successfully employed ...