Micrathena_breviceps - the side view

The spider genus Micrathena contains more than a hundred species, most of them Neotropical woodland orb-weavers.
With the naked eye they stand out due to the arrow-shaped body being colored bright yellow contrasting with a black background. This combination is highly visible. As you might expect the spider may not be attracting attention to itself inviting predators to prey upon it. This is warning coloration also known as aposomatic coloration. Any bird naive enough to ignore those colors.. more