Smaller natural habitat, more human encroachment, and less food are the three main causes for the decline of the frog species.
Humans are the main natural enemies of Uakari monkeys. Hunting and habitat destruction are some of the main causes of the decline in this monkey species.
i think it wass because
The mains cases for Bee decline are that vital nectar resources have been lost and nesting sites have been lost as cropping patterns have changed.
There are four main tree frogs species in the world. The European tree frog found mostly in eastern Europe, the Common tree frog found in south east Asia, the Cuban tree frog found in Cuba, Florida and the Caribbean Islands and the Red Eyed tree frog of Central America.
Humanity itself causes endangerment of animal species due to poaching, deforestation and pollution.
the three main causes are that they may not be fertilized, the temperature is not right, or the African dwarf frogs will mistake the eggs for food and eat them
the heart is the main circulatory organ of the frog
One of the main cause for the extinction of species is hunting. Some causes like climatic changes may also lead to the extinction in species. Extinction of Neanderthals is one good example of climatic changes. At that age in Europe the temperature dropped down and it was impossible to survive over there for the Neanderthals and therefore, the Neanderthals died making them one of the extinct species today.
The notes I'm seeing is that the Oregon Spotted Frog is considered "Vulnerable" and not "Endangered". But it is a subcategory under Threatened. Other notes indicated that it is a "Candidate" for the Endangered Species List. The frog has a relatively limited native range in the Cascades and various marshy lakes. A limited native distribution of any species puts it at an inherent risk to any changes that could change its competitiveness. While Oregonians don't particularly hunt and eat frogs... The main problems are habitat loss, non-native predators, and increased competition. The bullfrog is a non-native predator of the spotted frog. Human activities such as logging, or changing of wetlands and meadows into farmlands, or introducing non-native plants and other species could also affect their populations. See U.S. Fish and Wildlife Link.
Rome's problems had actually started long before 300. For about a century, crime rates had been rising and poverty had been increasing.
This is true that the Mughals were pleasure seeking but this was not the main reason for their decline. The weakening of the army plus the attacks from the Persians are the main reasons for their decline.
Global warming is the main reason for polar bears decline.