Thoughts, ideas, photos, and stories.

Introduced Species


The balance of nature has been out of kilter for hundreds of years – basically, since man has interfered to make things better. In many cases, some species have been introduced to an area where they are not indigenous to solve a problem “naturally,” without resorting to pesticides or culling of another species.

An example is the cane toad in Australia. It was brought into the country to deal with the cane beetle in the sugar cane fields. Unfortunately the cane toad is now the bigger problem.

Rabbits, too, were introduced there, and have multiplied as only rabbits can, making their population unmanageable.

The green crab has been transported in ships’ ballasts and has upset the marine ecosystems wherever it has established itself.

Zebra mussels are also an invasive species transported by ships.

Feral swine (also called wild pigs, Eurasian boar, or feral hogs) destroy agricultural fields and impact the regeneration of forests by eating the seeds, nuts, and cones of trees. The swine are omnivorous and so are a threat to young livestock. They can do tremendous damage to the agricultural industry. Feral swine carry at least 30 types of diseases and 40 types of parasites. They are really bad news!

Burmese pythons have been introduced to Florida’s Everglades through the pet trade and have upset the balance of nature there. They prey on rabbits, foxes, raccoons, and birds, to name a few. Many populations of smaller mammals have been decimated. The Burmese python has also brought a pentastome parasitic disease, infecting other reptiles. The parasite is now considered to be endemic in Florida.


So you see that introduced species can be quite detrimental to their new habitat.

While trout fishing on a local lake recently, the Captain encountered a new invasive species, the freshwater crocodile. It is pictured here, photo taken with the Captain’s little point-and-click Fuji camera. It is a bit blurry because he was shaking with fear, and paddling with one hand while he risked his life to take the photo with the other.

If you ever find yourself tempted to swim in a freshwater lake in British Columbia, be aware that these newly introduced crocodiles could appear from the depths to nibble on their favourite delicacy, swimmers’ toes.

Author: wordsfromanneli

Writing, travel, photography, nature, more writing....

31 thoughts on “Introduced Species

  1. I’ll be sure to avoid the lakes when in BC! The zebra mussels have been a terrible thing in the Great lakes. I’ve seen them attached to my dad’s boat, the hull, propellers, the lower unit. Hard to get off, and they clog water intakes and more. But, they do make the lake water clearer.

    Liked by 3 people

  2. It is amazing–all the species we introduce into environs where they have no natural predator. Really good picture by the Captain, btw!

    Liked by 1 person

  3. Hahaha! This is interesting πŸ˜‰

    Liked by 1 person

  4. Wow ..I didn’t realize there were crocodiles in BC . Thanks for sharing this. Anita

    Liked by 1 person

  5. Add to the crocodiles the monsters that are crowding the beaches of the Arrow Lakes.

    Liked by 1 person

  6. Introducing a species to eradicate a pest often makes things a lot worse. Then there are the hitchhikers on vessels and freight. Not to mention freshwater crocodiles 😏

    Liked by 1 person

  7. That’s very interesting. Man’s interference certainly has caused unbalances.

    Liked by 1 person

  8. This is scary! I can imagine the Captain being shaky, especially coming face to face with an unexpected crocodile. Lovely tulips, Anneli! ❀

    Liked by 1 person

  9. Ha ha ha. I’m glad the Captain survived his encounter with the invasive, ferocious, dreaded Lake Crocodile. πŸ™‚

    Liked by 1 person

  10. Get outta here!!!!!!!!!! No way. Are you making this up?
    By the way, the worst invasive species to my mind is KUDZU in the American southeast. Ick.

    Liked by 1 person

  11. Yes sometimes introducing a species is necessary but can make some problems also. Beautiful article thanks for sharing πŸ˜ŠπŸ‘πŸ‘

    Liked by 1 person

  12. Wow! I certainly never caught one of those on my trailcams when I was in BC πŸ˜‰

    We’ve had our ups and downs with introduced species in the UK. Some have been here so long that they’ve become naturalised and are important for extremely wildlife-rich ecosystems (e.g. rabbits in the Brecklands). A handful just exist without being invasive – e.g red-necked wallabies and water deer. But others are a major headache, such as Japanese knotweed, many water plants, fallow deer and buddleia. And cherry laurel. I have no idea why people are still allowed to plant that in their gardens!

    Hope you’re well, Anneli. I’ve been away from WordPress for quite a while.

    Liked by 1 person

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