Amy Whitehead's Research

the ecological musings of a conservation biologist

Wildlife Wednesday: Echidna

6 Comments


For as long as I have known about echidna, I’ve wanted to see one.  Something about the whole mammal that lays eggs thing that is just so weird but totally intriguing.  So every time I’ve been out in the wilds of Australia, I’ve been looking for one of these spiky little critters.  But alas I’d been unsuccessful, despite spotting plenty of signs that echidna were in the neighbourhood.

That is until I went to the Dryandra Woodland in Western Australia. We were on a walk that was touted for its abundance of woylie diggings and numbats.  We saw plenty of diggings but no numbats and were lamenting this fact towards the end of the walk when there was a noise in the undergrowth caught our attention.

Echidna!

DSC_1520

Often referred to as spiny anteaters, echidna are covered in spines and coarse hair and have a long slender snout.  They tend to be solitary and are powerful diggers with strong legs and claws.  I think that echidna diggings look superficially like a turtle has been flailing about in the leaves (others may just think I’m weird!).  Echidna feed on ants, termites, worms and insect larvae which they dig out of rotting logs and anthills.  They don’t have any teeth, instead collecting prey with a long, sticky tongue that protrudes from their snout.

As I eluded to earlier, echidna are monotremes – mammals that lay eggs.  This is clearly an unusual strategy, with platypus making up the only one other group of monotremes.  I had always assumed that laying eggs meant that echidna would build nests.  But it turns out that female echidna actually lay a single leathery egg and carry it around in a rear-facing pouch similar to the pouches of marsupials.  The egg hatches after about 10 days and the puggle (the name for a baby echidna) spends about 2-3 months hanging out in the pouch.   It suckles from patches in the skin that secrete milk as monotremes don’t have nipples.  Once the puggle begins to develop spines, it gets kicked out of the pouch (fair enough!) and into a nursery burrow.  The female echidna will return every five days or so to feed the puggle until it gets weaned at about seven months.

Echidna are found throughout Australia and New Guinea, with three recognised genera.  Only one species occurs in Australia, the short-beaked echidna (Tachyglossus aculeatus).  The name echidna comes from greek mythology – Echidna was half woman, half snake and was mother of all monsters (she sounds like a charmer!).

Advertisements

6 thoughts on “Wildlife Wednesday: Echidna

  1. That’s a very interesting creature. Thanks for the photo and background.

  2. Pingback: Recent Qaecologist blog posts (April 2013) | Quantitative & Applied Ecology Group

  3. You would have been extremely lucky indeed to have spotted a numbat at Dryandra these days. Numbat numbers have declined steeply in the past few years after an original bounce back following predator control, and ongoing research is addressing a putative mesopredator release. Following Operation Foxglove (a state managed baiting program run by the department of Environment and Conservation – then known as CALM), fox numbers were reduced through baiting, but this may have inadvertantly caused an increase in that other serious feral predator, feral cats.

    • Damn mesopredator releases! It’s such a shame to see the hard work that has been done to control foxes inadvertently cause an increase in another predator. Hopefully we can figure out an effective way to control cats before we lose numbats and their other furry friends forever.

  4. Pingback: A true Australian love dance | Everything Aussie

  5. Pingback: Echidna hatching from egg, video | Dear Kitty. Some blog

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s