Hedgehogs and shrews, although somewhat similar in size and general appearance, have distinct differences:
Hedgehogs:
- Belong to the family Erinaceidae.
- Have a coat of spines or quills, which are modified hairs.
- Are primarily insectivorous but can have a varied diet including small vertebrates and plants.
- Roll into a ball as a defense mechanism.
- Have a more robust body structure.
- Tend to have longer lifespans, typically 2-5 years in the wild.
- Are not known for being particularly fast or agile.
Shrews:
- Belong to the family Soricidae.
- Do not have spines; they have a fur coat.
- Are intensely insectivorous, often requiring food intake several times their body weight each day.
- Use rapid movements and high metabolism to avoid predators rather than rolling into a ball.
- Have a more elongated and slender body with a pointed snout.
- Generally have shorter lifespans, often less than 2 years in the wild.
- Are known for their agility and fast movements.
In terms of behavior, hedgehogs are more likely to be solitary and are not as aggressive as shrews. Shrews are known for their voracious appetites and high levels of activity, necessitated by their extremely high metabolism. These distinctions are crucial for their different survival strategies in the wild.