@d123
If you look at the photo, ypu will notice one BRIDGE unpopulated (it has dashed line on silk between pads). Definetly it is a piece of wire suitably placed in a piece of some material to resemble a 0 ohm resistor (one black stripe). Body color does not matter, it is dependent on manufacturer.
If you want to measure your 0 ohm resistors, connect as many as you can in series and measure resistance. The more of those in series, it will be easier to determine the resistance (unless you have quite expensive microohm meter).