Last year was another discovery year 🙂 Now from the garden. My backyard was an authentic zoo. We let the wild plants grow and all the little bugs and whatever animals loved it. And I loved that they love it!! There is also a cat coming once and a while. During August, my boyfriend convinced me to buy a biscuit box to blackmail ‘her’ (to me all the nice animals are female …:p), for ‘her’ to come more often. The cat did not like those biscuits that much, especially after they all got moisty during the evening, after raining!
Our Backyard Friends had a party! Actually I think the slugs started it! During the evening opiliones, slugs, snails…they came and loved it! As you can more or less imagine by looking at the pictures.
These animals were quite happy eating all the moisty biscuits. (I’ll go into details later, with a video)
However, this got me worried. It seemed to me they could not stop eating that stuff..and we could definitely see the slugs growing larger…I honestly thought they could explode!
The funny part was that in the end the cat did not come more frequently… Plus….i fell in love with both the opiliones and the slugs..
3rd on a couple of labs doing research on this subject, for example http://www.spiderlab.dk/social-spiders.html. Although a rare trait among spiders, it can happen! There are a few species that indeed share web, nests, capture preys together and there is also evidence of cooperative breeding. Some other species are not permanently social but can have a social period in the juvenile stage, before dispersing. (source: the last link has some references, e.g. Whitehouse & Lubin 2005)
I will not go deep into any of this for now. I just want to share some of what I observed. More information can be found by following the weblinks.
Going back to my window:
After some time, Madame Diadematus disappeared. I was also away for some time, so I lost track of events. … but one day in April the eggs hatched. One day they were born…they must have :). If you look at the pictures you can see groups of tiny spiders clumped together.
These little spiders were grouped together for some time, a few days. Every time some strange ‘foreigner’ web vibration occurred they would disperse a little and then when all was calm they would form the groups again. I did not check whether the newly formed groups would keep the same individuals or if they would randomly regroup again…would be nice to check on that! Although I have to say that the spread was not huge…. I thought to myself that this is a kind of social gathering. …or not? Well as aforementioned… they do aggregate right after hatching. I would speculate that …yes, it seems so…but this should be properly tested 😉
They were together I suspect for protection (?). Maybe by grouping themselves they can simulate a larger body and predators (maybe birds? I do not know if they have predators though…) would ‘think twice’ (?).
They were yellow and had a black stain (see pictures). On the other hand would this can attract insects(?) Not sure of what/if they ate!
One day the little ones spread and went away. A few days (maybe weeks) later I realize that I have two spiders…one on each corner of my window… probably from those little-one’s groups.