The phrases warm and cold blooded have fallen out of favour with scientists as they have begun to understand more about the thermo regulatory systems of animals. Instead warm and cold blooded could be seen as either end of a range of thermo regulatory systems that includes many differences between the animal classes. Please see this link for more detail.
Warm blooded animals maintain their core at a constant temperature regardless of the environment and have evolved systems to generate heat (eg shivering) or cool down (eg sweating). Cold blooded animals have a temperature dependent on the environment. However, some animals previously considered simply as cold blooded use the sun to warm themselves or flowing water to cool down (ectothermy), and others adjust their metabolism (bradymetabolism).
The image above shows a snake eating a mouse! Below is a furry Tarantula on a fur less human hand.
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