There are three main species of black widow spider, all of which have very similar characteristics and inhabit areas in Northern America and parts of Mexico. Until very recently all three species of black widow spider were classified as one but recent research shows that as the species inhabit different areas, the three species of black widow spider have adapted to their environment in different ways.
The Northern black widow spider is primarily found in the north east of the USA and parts of south east Canada, although the range of the northern black widow spider overlaps with that of the western black widow spider a great deal.
The Western black widow spider inhabits areas of t
The yak is a herd animal found in the mountainous regions of central Asia. The yak tend to gather in herds from 10 yaks to 100 yaks, most of which are female. There are only a few male yaks per herd.
Although there is a large domestic population of yak, there are only a few wild yak remaining . The yak is still used in many parts of central Asia, for pulling heavy farm machines and transporting large loads through the mountain passes.
The average male yak can grow to about 2meters tall, with the female yak being about 1/3 the size of the male yak. All yak have very long hair to keep them warm.
The yak belongs to the same cow family as the Asian water buffalo, the African bu
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The crane is a large, long-beaked bird that is found all over the world. There are 15 different species of crane found on Earth today, but despite their similar appearance, cranes are not related to other long-necked birds such as herons.
Cranes are found on every continent with the exceptions of the Antarctic and South America, where they are found inhabiting the temperate wetlands and swamps throughout the Northern and Southern Hemispheres.
Cranes are large sized birds that to grow to an average of 1 meter in height. Some species of crane however, such as the Red-Crowned crane of Eastern Asia, can grow to nearly 1.5 meters tall. Other crane species can be slightly smaller altho
