chock chocking danger electric electrical electricity fence grid high power secure security sundtech voltage warning wire black current dangerous installation net sign station volt yellow berth bow british chocks concrete discovery dock dry dundee hull jack masts museum port prow repair ship union construction crane site ac/dc distibution point distribution electric energy electric power energy high voltage industrial pole post Power station relay station steal substation support technology transformation aggressive anthochaera carunculata Australian native barking-bird bird Camouflage common defensive fauna gardens gillbird grating gray-brown grayish-brown grey-brown plumage greyish-brown harsh honey eater honeyeater large native bird nectivorous Noisy prominent red wattle red wattle bird silver-white cheek patch wattle wattled honeyeater what’s o’clock white streaks widespread wildlife yellow underbelly blue sky coral tree red flowers