(If you don’t like tiny creepy crawlies, I suggest you go and look at a different post!)
On our walks in the woods recently we have once again noticed little black specks on the snow. Until now we thought it must be dirt from the machinery used for forestry or from old tractors driving through the woods, but this year it was extreme and so we took a closer look…
Here we saw that where tracks are (from tractor tyres, deer, our footprints, skis etc) there is more of this ‘dirt’. Could it be soot? Is our air so bad? Here, in the middle of nowhere, with no industry for miles…
When we got home my Man of Many Talents googled for ages, trying to find something about it, and when he showed me what he had found I was AMAZED! He went back to get more photos so we could check the facts!
Now I’m going to get even closer…
They are SNOW FLEAS! Now, maybe we are the only people in the world who have never heard of snow fleas before, so I hope I am not showing my ignorance, but aren’t they simply incredible? Here are several hundred or even thousands of them gathering in the hollows of tracks.
Now a little information that we found in German, summarized:
Snow fleas come out of the ground in February/March when the temperature is just above freezing. They are often thought to be soot, as they cover the snow quite thickly in places. But these ‘specks of dirt’ are all the same size (around 1 millimetre long). They can crawl and jump (about 10cm high). However, they aren’t actually fleas, but springtails, so Wikipedia says they are technically not insects.
They emerge at temperatures of about -3°C, and live on fungi, pollen or algae which provide them with a special protein that functions as a kind of antifreeze. They prefer damp forests with evergreens. It is a real migration at this time of year, as they use the snow to move more easily and to search for food and for new ground where they can increase their population.
For scientific purposes my Man of Many Talents let some crawl across his hand, and we think they are actually smaller than 1 millimetre…
So, please let me know if you have ever encountered these fascinating little creatures and any extra information would be very welcome!