It is missing some legs to be a spider and the head looks more like a frog, so what could it be? A spog? A frider?
Critter
by gaby in Brookline and tagged AF-S VR Nikkor 70-300mm, blue, cables, connecting element, connection, critter, frider, frog, industrial, link, metal, Nikon D5000, rust, screws, sky, spider, spog, tram, trolley wire, wire
blogabydotcom 
An extra from one of the Transformers films perhaps?
Maybe 😉