How many species of spiders are there in the world?
141678
There are lots, but not a million. "At present tazonomists recognize about 34,000 spider species..." (Biology of Spiders, by Rainer F. Foelix, second edition, pg 3) Scientist think there could be about twice that many total.
123548
Yes, but it is so slow we won't register it. We only live a second, compared to the lifespan of the earth and it's evolving creatures. \nAs far as the spiders and other creatures are concerned, this is more of a fact of 'finding' and discovering new creatures, not necessarily that they just evolved.
558326
Arachnids include the spiders, scorpions and their relatives such as pseudoscorpions, camel spiders, whipscorpions, mites and ticks, and daddy longlegs.\n\nThis is a highly diverse group, that ranges in size from tiny pseudoscorpions that are nearly microscopic up to the gigantic goliath bird-eating spider of South America that can ten inches across.  They live in almost every habitat on Earth, including Antarctica, the Sahara desert and everywhere in between.\n\nEach species has its own ecological niche, with its own predators and prey.  So there isn't any single 'main predator' on arachnids.  Each species would have its own position on the food chain.
863776
Around 23 different Species, under the Wikipedia listing of the Genus "Python"
86757
There were many. Most ones you would never notice.\n\n3 species of jellyfish, over 20 species of fish, 39 species of snails, 10 species of coral.\n\nOn land, over 400 species of insects, over 50 species of spiders,\n\n3 new mammal species.\n\n100+ species of birds.\n\nAll of these were discovered in the past 10 years. Most are form microhabitats and mosty are threatened by habitat descruction and a few may already be extinct in just the past 10 years.
462630
According to the myrmecologists (ant specialists), there are over 20 000 species of ants on our planet, grouped into 350 different genera. It is in the ponerine tribe that the world's largest ants are found, namely, the Paraponera and the Dinoponera.\n \nThe Dinoponera gigantea are by far the largest, measuring up to three centimetres in length.
991656
Estimates of the present global macroscopic species diversity vary from 2 million to 100 million species, with a best estimate of somewhere near 10 million. Note the word macroscopic, this excludes microscopic oragnisms.\n\nThe U.S. has over 17,000 identified native plant and tree species, including 5,000 just in California. With habitats ranging from tropical to arctic, the flora of the U.S. is the most diverse of any country; yet, thousands of non-native exotic species sometimes adversely affect indigenous plant and animal communities. Over 400 species of mammal, 700 species of bird, 500 species of reptile and amphibian, and 90,000 species of insect have been documented.\n\n Insects are the most diverse group of animals on the earth, with around 925,000 species described—more than all other animal groups combined. There's over a million arthropods, a group which includes insects.\n\nAbout 350,000 species of plants have been estimated to exist. As of 2004, some 287,655 species had been identified, of which 258,650 are flowering.\n\nI'm just adding them up.
448488
Black Widow is considered the most venomous spider in North America.\n\nThe venom of the black widow spider is 15 times as toxic as the venom of the prairie rattlesnake.\n\nA group of spiders that is dangerous in many countries belongs to the genus Latrodectus in the Family Theridiidae. In Australia we have the Redback Spider (Latrodectus hasselti). In America, a common representative of this genus is the Black Widow (Latrodectus mactans).\n\ni would say that they are as dangerous as each other but the black widow killed more than the red back
750933
Yes y am familiar with this kind of spider.y am from Romania and we have a lot of them around.it is called the metal spider.yes is poison es but it is very slow but he can camouflage itself very well.
475647
This question is a bit misleading... only SOME species of spider die soon after laying their eggs. Many will live on for years and can reproduce several times.\n\nAs to those few which do die; reproduction is a very costly endeavor for any organism and this could diminish the spider's resources. Evolutionarily speaking, the only goal it to get one's genetic material to the next generation, that done, the organism is simply taking up habitat.
1022187
Yup and so are spiders scorpions and crabs, They all have the same exo-skeleton, and the same amount of legs   8    That puts lobsters, scorpions, crabs ,spiders, ticks and???No one knows for sure  all in the same family, BON APPETITE"
1124532
There are black widow spiders in southern Ontario.  Most of Canada is too cold for them.  \n\nThe brown recluse spider whose bite is quite bad,  is also found in Canada.  Some kind of spider can be found pretty much everywhere in Canada.  \n\nI hope this helps.
412874
cats, birds, lizards, spiders, small children
1141924
It's the herpyllus vasifer spdier - and ... I recommend this website - I'm terrified of spiders and can't research this one for you - sorry!
1057442
The animal kingdom is enormous and we do not know for certain how many species there are in the world. Around 1.5 million species of animal have been named and described by scientists - and over a million of these are insects.
503181
No only the females are black with the red hour glass.  The male of the species are a brownish color and do not have the red.  You can always recognize their webs.  They are more random not a tight weave as some spiders and the strands are very strong.  I hear they kill their mate after mating and that is the reason for the black widow name of the species...smart spider.
229111
I am looking at two spiders of different species (I don't know which two, but I think it's a brown spider and a more exotic type) right now in the corner and the exotic one has been trapped in the other's web.