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Galapagos Island Wildlife: A Unique Experience

October 5, 2012 by Arianwen Morris 15 Comments

Ecuador is one of the most species-rich countries in the world and this is largely down to the diversity of Galapagos Island wildlife. Many of the species found on the Galapagos Islands are endemic, and it’s common for their names to have the prefix ‘Galapagos’.

One of the most unique attributes of Galapagos Island wildlife is that it barely seems to acknowledge the presence of humans. This means you can get really close (but no more than 2 metres so as not to affect their behaviour).

GALAPAGOS ISLAND WILDLIFE

The following are some of the Galapagos Islands’ most loved resident species.

BLUE-FOOTED BOOBIES

Galapagos Island Wildlife - blue-footed boobies

Blue-footed boobies are among the most famous residents of this archipelago. The name ‘booby’ stems from the Spanish term ‘bobo’, meaning ‘stupid’ or ‘foolish’. As soon as you see them waddling around clumsily, you’ll understand why.

Female boobies are slightly larger than the males. They both have yellow irises, but the females’ are smaller because they need larger pupils for better vision. The males do an awkward dance, flaunting their blue feet and whistling to attract a female. The brightness of the male’s feet changes depending on his daily diet, and the female can alter her reproductive investment – changing egg size – depending on the perceived quality of her mate.

SEA LIONS

Galapagos Island Wildlife - sea lions

There are quite a few species of sea lion on the Galapagos, but the most numerous is the helpfully named ‘Galapagos sea lion’, which is only found in the Galapagos and Isla de la Plata, off the coast of mainland Ecuador.

Their morphology makes them ideally suited to swimming and fishing in the ocean. Once on land, when they’re not lying moribund for hours at a time, they stumble over each other, heaving their bodies across the sand. Often, the only way to tell they’re still alive is the occasional sneeze or sneaky peek out of one sleep-encrusted eye.

Sadly, this species of sea lion is very vulnerable to human activity. Their inquisitive nature means they approach nets, fishing hooks and human garbage. Thankfully, local residents make special efforts to protect their Galapagos Island wildlife, and they take special efforts to impart this mentality onto those who visit too.

MARINE IGUANAS

Galapagos Island Wildlife - marine iguana

Marine iguanas are also exclusive to the Galapagos Islands. They are the world’s only seagoing lizards. Our guide told us that Charles Darwin described them as disgusting and clumsy; disgusting because they sneeze salt all over the rocks, and clumsy because they clamber awkwardly over each other as they seek out the best spot for basking in the sun.

They have flat snouts so they can feed on algae from the rocks, and strong claws allow them to cling on to the lava, preventing them from being swept too far out to sea by strong currents.

Marine iguanas are threatened by introduced species like cats and dogs, but efforts are being made on the islands to eradicate or control introduced species.

GIANT TORTOISES

Galapagos Island Wildlife - giant tortoise

The giant Galapagos tortoise has the longest lifespan of all vertebrates, often living to the ripe old age of between 100 and 150 years. Sadly, the Galapagos Islands’ most famous resident – Lonesome George, the last of the Pinta Island species – died earlier this year.

Giant tortoises can weigh as much as 300 kg. Because they can survive for many months without food and water, sailors in the 16th and 17th centuries used to pack them into their ships’ holds as a source of fresh meat. This, and, more recently, introduced species, has threatened the population, but there are currently breeding programmes and rescue centres in place on a number of the islands.

GALAPAGOS FINCHES

Galapagos Island Wildlife - Galapagos finch

Galapagos finches are the world’s best known example of natural selection. When Darwin spent 6 weeks observing wildlife in the Galapagos, he made one very significant observation – that the beaks of the finches on each of the islands in the archipelago were adapted to the diets available on those islands.

How he came to notice this, I don’t know. They all looked the same to me. I wonder if I discovered a new species adapted to drinking from wine glasses…?

SALLY LIGHTFOOT CRABS

Galapagos Island Wildlife - Sally lightfoot crabs

These colourful creatures live just above the limit of the sea spray on the rocky lava shores of the Galapagos Islands, commonly competing for space with hundreds of marine iguanas.

They’re perhaps the only animal I had difficulty photographing because they would scarper as soon as we got close. And the task wasn’t made any easier by the fact that the algae-covered rocks on which they feed are often very slippery. I have a scarred shin to proove it!

MARINE TURTLES

Galapagos Island Wildlife - sea turtle

The Galapagos green turtle is a great animal to watch – both on land as it tests out patches of beach for egg laying, and in the sea, as you chase after it with your fins on a guided tour of the marine Galapagos Island wildlife whilst on a Galapagos cruise.

It is difficult to tell the sexes apart, but we were informed that the male’s tail also doubles up as its penis and, as a result, it’s longer. The females only lay eggs every 2 or 3 years, adding to the vulnerability of the species, although they lay between 50 and 200 at a time, to increase the chances that at least some of the offspring will survive. After laying and covering the eggs, the female turtle has been known to dig another, fake nest to fool predators, as well as flinging sand around to disguise her tracks.

GALAPAGOS HAWKS

Galapagos Island Wildlife - Galapagos hawk

This Galapagos Hawk perched happily for 10 minutes or so on the end of a stick held by out tour guide. The next time I saw a Galapagos hawk, it was perched on a rock 2 feet away from a sea lion and they were both looking out to sea!

If a male wants to mate with a female, he will dive bomb her in a fake attack. Then he’ll follow her as she flies away. Perhaps the female’s revenge for this behaviour is to mate with up to seven different males in one season.

Sadly, these birds are now extinct on a number of the islands and records suggest there are fewer than 200 mating pairs left. As with so much of the Galapagos Island wildlife, they are threatened as a result of introduced species and disturbance of their habitat by humans.

Comments

  1. NomadTravels says

    October 6, 2012 at 8:22 pm

    Way to rope people in with a blog headline. ;) I’ve dreamed of going to Galapagos for years, by sailboat if possible. Thanks for a great blog post, your pictures are rich with color and life!

    – Nomad
    NomadTravels recently posted..Travel Hacking – Nomad Style 2My Profile

    Reply
    • Arianwen Morris says

      October 7, 2012 at 12:54 am

      Haha. Thanks! You should definitely check out the Galapagos. They are incredible. And a guided cruise when you’re there is a must – you see so much more!

      Reply
  2. Les Petits Pas de Juls says

    October 7, 2012 at 1:10 am

    Now I really want to go! well, I really wanted to go before and every time you write I really want to go now! ahahaha there’s now way I’ll miss it! Some day…
    Thanks for so much information! it was great reading you!
    Happy trails!
    Jul’
    Les Petits Pas de Juls recently posted..Weekly Photo Challenge : Happy!My Profile

    Reply
    • Arianwen Morris says

      October 7, 2012 at 4:17 pm

      You will have to let me know when you go! I’d love to hear about it! :)

      Reply
  3. Bex says

    October 7, 2012 at 10:29 am

    Ari – great little overview of the Galapagos residents – very interesting! It reminded me a little bit of my 1st year uni essay I wrote on evolution of species, which included Darwin’s finches. I think I got 30% for that essay. Nice memories. xx

    Reply
    • Arianwen Morris says

      October 7, 2012 at 4:16 pm

      I remember that essay too! I got marked down because I thought hyenas were cats!! Oh dear.

      Reply

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