Rodents

 

Hello everyone, it is hot here and it is the type of day that I feel like doing stuff for an hour or so then I need to have a rest.

Anyway this week we are looking at rodents they are the largest order of mammals with hour many species there are. There are around 2,500 different species around the world.

Rodents are found everywhere except in Antarctica.

The character traits of rodents are incredibly diverse, as they are the largest order of mammals. However, they share several key physical and behavioural characteristics that define the group such as.

They have sharp incisor teeth which never stop growing and are kept short by gnawing.

They lack canine teeth and some premolars, leaving a distinct gap (diastema) between their incisors and their cheek teeth (molars/premolars).

While most are small (mice, hamsters), the order includes the largest living rodent, the capybara which weighs up to 70 kg.

They typically have robust bodies, short limbs, and a long tail although tails vary greatly—some are bushy like squirrels, others are nearly hairless like rats, and some are short or stubby.

They rely heavily on their long, sensitive whiskers to navigate and explore their environment, especially in the dark, as their vision is often less developed with many being colourblind or have poor eyesight.

Also they lack sweat glands and dissipate heat primarily through their tails and ears, making them susceptible to overheating.

They are one of the most successful mammalian groups, inhabiting nearly every environment on every continent except Antarctica. They are highly adaptable to new and human-disturbed environments.

The majority are herbivores, feeding on seeds, nuts, fruit, and plants, but many are omnivorous (like rats), and some are specialized predators (like grasshopper mice).

They are known for their high reproductive capacity, having large litters and short gestation periods, which helps compensate for high predation rates.