Animal migration ... swarms of locusts are under the influence of the hormone serotonin. The connections between day length, annual reproductive cycle and migration are now well established in ...

People have always been interested in where wild animals go, especially when they were a primary food source. Now one of the questions is: why are North American grassland bird populations shrinking?

Bird migration has fascinated people for centuries. Migratory patterns are also dynamic and research is needed to understand changes in movement of species. Majority of the bird species in North ...