Early morning spider web

This little spider has been busy! I haven’t noticed any activity (the duranta tree is on my balcony), but this morning, with the early sun at the right angle, I clearly saw her/his handiwork. The spider itself is tiny (you can see it right in the centre, glowing in the sunshine), and by the same token the web is not as large as a dinner plate. What I love about this shot is how clear the web pattern is. You can easily imagine this little creature patiently crawling one way, turning, crawling another, turning … That’s a lot of effort to catch your dinner.

What I don’t understand is how spiders set those anchoring strands. Do they just shoot out some silk and hope it latches on to something?