Out of the six British species of Tetragnatha, two are larger and more common and one of them associates with water, T. extensa, although detailed genital examination is needed for a secure identification.
Tetragnatha have very large jaws, and the males using their modified jaws to lock the female's in place - and keep out of danger - when mating.
You can see the folded fangs in this shot
And this is a scanned figure from Bristowe's The World of Spiders (1958), drawn by Arthur Smith, demonstrating the locking mechanism (male at the bottom)
I took this shot to give you an idea of the size of the spider
For a wonderful account of the mating behaviour and natural history of these spiders, go to the Spiderbytes blog.
5 comments:
I saw one of these by the pond in our garden earlier and had no idea what it was, google led me to your blog post so thank you for helping me to identify it!
Thank you Angela!
Have these on the reeds in my pond. And I'm from Hull.
I saw one today by our pond in Washington State so I had to google it, thank you for the info and great photos!
Thanks i have 5 over my pond . Thanks for the information
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