The beauty of the delectable tender leaves in the garden will be short-lived when the night-wandering pests sneak in the dark. The sight of damaged seeds, hole-riddled plants, and slimy mucus will be customary, and it signals the visit of snails and slugs. They are common garden pests dreaded by a gardener.
Snail vs Slug
The main difference between snail and slug is that snail has a solid protective external shell. It squeezes into the armor for comfort or protection. The slug has no protective exterior cover, and it may have an internal shell or a reduced shell.
Snails are invertebrates, which means they have no backbone. They have a shell on the back, which becomes a home as they retreat inside when they sense danger. In both lands and the sea, you find snails. The land snails need moisture to survive. Their presence is active at night or when cloudy and rainy.
Slug is not an insect. Slug has a small elongated body, either gray or brown. It glides with a slithery foot and the sheath of muscle on the underside of its body. As it moves, it leaves a trail of slippery mucus. It loves to stay in a damp, cool place. They relish green leafy vegetables like lettuce or a tender leaf of a plant.
Comparison Table Between Snail and Slug
What is a Snail?
Snails date back to the earliest known animal as there is fossil evidence to prove the presence of gastropods in the Cambrian period, dated 500 million years back.
There are many types of snails. The main being aquatic or earthly. The former is adapted to live in the sea or freshwater bodies. The latter is adaptable to live on land but in humid conditions.
The land snails are gastropods, the same group as the octopus. Being gastropods, they adapt to different living conditions, and they are not big eaters and constantly evolve to their current living conditions.
The noticeable physical feature of the snail is the curled shell on the back, and it is a solid structure composed of calcium carbonate, and it protects the soft body and the inner organs. The armor keeps growing by adding more calcium carbonate till it reaches adulthood.
The lungs are the most crucial organ the land snails breathe to get oxygen. Very few species of aquatic snails breathe air. The land snail range is size. Some are a few inches and weigh a few ounces. There are a few which are 12 inches long as the Giant African land snail.
Snails have a muscular foot which allows the snail to move. The mucus the snail secretes to slide maintains the moisture and reduces the friction. The friction may harm the snail, and the speed of the snail is slow. Land snails can’t hear, and they utilize the sense of smell to find food.
The male snail may mate and lay eggs. The life span of the snail in the wild is around 3-7 years. But in captivity, they survive 10-15 years. The snail releases fruits like tomatoes and strawberries. They avoid rough and aromatic leaves. To conclude snails, are much more than an attractive shells.
What is a slug?
Slugs are snails without the external coil. Some have internal shells which utilized to store minerals. The mucus protects their body as they secrete on the surface while traveling.
Slugs are hermaphrodites, which imply both the male and female reproductive organs are present. They mate with their partners and fertilize their partner’s eggs. Slugs have a lifespan of 1-5 years. During winters, they burrow underground, and nearly 95% of them are underground.
Slugs resemble a fat worm with two eyestalks. They even contain olfactory (sense of smell) organs and have two minuscule tentacles utilized as taste buds. Most of the slugs are brown or gray. The skin of the slug is moist and has a thin film of mucus. It helps to retain moisture and protect from predators.
Food and moisture attract slugs. They relish flowers and vegetables. During the day or a hot spell, they enjoy moisture-retaining places like leaves and straw. A slug eats much more than its body weight every night. The harm done to the plants is an eye-sore to the farmer or gardener.
Slugs are happy eaters, and they enjoy cardboard, decomposed plants, flowers, fruits, vegetables, feces, dead animals. The menu is vast and diverse. The slime of the slug has anesthetic properties, and the exposure causes numbness. The slugs can withstand immersion underwater, but several hours will cause drowning. A slug is not dangerous but causes damage to the plants in the garden.
Main Differences Between a Snail and Slug
- Snail has an external shell large enough to protect itself from predators or natural calamities. Slug may have an internal coverage to store minerals.
- The snail’s lifespan is about 2-3 years in the wild or 15 years in captivity. The slug has a life span of 1-6 years.
- The snail can grow to 10 inches. The slug can increase by around 15 inches.
- Snails reside in soil, under rocks, trees, and in water bodies. Slugs prefer cool or moist places. They thrive during the spring.
- Snails relish on food and are constantly in search of food. Slugs prefer thriving on plant lives at night.
Conclusion
Snails and slugs prefer a moist and humid climate. A gardener’s nightmare as they thrive through leaves and flowers. The snail’s shell is calcium, and they favor the soil and weather conditions to flourish on the calcium deposits.
The slugs without shells prefer moisture to protect themselves. The mucus trail is evidence of the presence of a slug and snail. The mucus acts as a protective film while moving.
There are many varieties of snails and slugs found across the world. Both snails and slugs are a source of food for humans and provide the right amount of protein. It is a blessing during famine conditions as they can a relished as a source of food.
References
- https://link.springer.com/article/10.1245/ASO.2005.04.010
- https://www.sciencedirect.com/science/article/pii/S0006291X13006633