Holes larger than this will invite larger birds and other predators to invade the box, which can be a danger to the chicks or prompt the invaders to take over the box and evict the current residents. The following chart will help select a birdhouse appropriate for housing a particular species. We not only give you an idea of the specification requirements of the house or platform, but also give you some tips about where and how high to mount it.
Why does the ocean not boil or freeze solid in different regions of the world? Heat is transported by oceanic and atmospheric circulation The pycnocline isolates the majority of the world ocean from heating and cooling brought on by solar energy fluctuations What is the main reason for the stratification in the north polar waters?
Global distribution of the worldâs water. The worldâs water exists naturally in different forms and locations: in the air, on the surface, below the ground, and in the oceans. Freshwater accounts for only 2.5% of the Earthâs water, and most of it is frozen in glaciers and ice caps. The remaining unfrozen freshwater is mainly found as groundwater, with only a small fraction present above ground or in the air.