Sharks are a group of fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade
Selachimorpha (or Selachii) and are the sister group to the rays. However, the term "shark" has also been used for extinct members of the subclass Elasmobranchii outside the Selachimorpha, such as Cladoselache and Xenacanthus, as well as other Chondrichthyes such as the holocephalid eugenedontidans. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Acanthodians are often referred to as "spiny sharks"; though they are n
The ladybird (also known as the ladybug) is a small colourful beetle found all around the world. There are thought to be more than 5,000 different species of ladybird in the world, with more than 450 species found in North America alone.
The ladybird is best known for it's spotted body (normally red and black, but often orange and yellow are found), and their ability to rid gardens of their aphid pests affectively. It is thought to be good luck to find that a ladybird has landed on you, and most definitely bad luck if you then squash it!
Ladybirds are small sized insects rarely growing to more than a centimetre in length. Ladybirds have size legs that are black in colour and thei
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The cockroach, also known as the roach, is found worldwide in every environment and every habitat with the exception of water. The cockroach is one of the most commonly known pests to humans of the insects world but plays a vital role in the ecosystem ingesting decomposing materials.
There are thought to be around 4,000 known species of cockroach in existence but only about 30 of the different species of cockroach are the ones that humans come into contact with. Cockroaches are generally not keen on close contact with humans and are only really present if there is enough for them to eat.
The cockroach is dated around 300 million years old, with fossil evidence suggesting that the
