WHY DON’T BIRD GET ELECTROCUTED WHILE PERCHING ON POWER LINES?
It’s not voltages per se that kill, but voltage differences which are needed for electricity to flow. If a bird lands on a single power line at say 35,000 volts, the lack of a voltage difference keeps it safe. If it extends its winds and touches another power line at a different voltage, then it will be electrocuted. That’s why electricity companies put plenty of space between cables.