BIRDS SIT ON ONE WIRE (EITHER THE HOT SIDE OR THE GROUND SIDE) OF THE THREE WIRE SYSTEM USED TO CARRY ALTERNATING CURRENT FROM THE SOURCE TO THE DESTINATION...example the generatores at a dam to your house.... IF ANYTHING CAN REACH ACROSS ANY TWO WIRES OF THIS SYSTEM THAT THING PROVIDES PROVIDES A PATH FOR ELECTRICAL (CURRENT) TO FLOW FROM ONE SIDE TO THE OTHER AND IN THE AMOUNT OF CURRENT DETERMINED BY THE ELECTRICAL RESISTANCE THAT THING PREVENTS THE PASSAGE OF ELECTRICITY. PRTMATIVE EXAMPLES WOULD BE: ORDINARY WOOD COMPARED TO AN ORDINARY STRIP OF COPPER; MAXIMUM RESISTANCE TO NO RESISTANCE. The ordinary example would indicate NO passage of electrical current to MAXIMUM passage of electrical current.
So a bird sitting on a single strand of wire and no part of its body touching another wire would provide no return path for the electrical current mainly because it's wings will only touch one wire. A human being MIGHT touch two wires and be electrocuted. It would be safe for a human being to work around electrical wires provided he/she (as does the bird) only touches a single source at any time.
So a bird sitting on a single strand of wire and no part of its body touching another wire would provide no return path for the electrical current mainly because it's wings will only touch one wire. A human being MIGHT touch two wires and be electrocuted. It would be safe for a human being to work around electrical wires provided he/she (as does the bird) only touches a single source at any time.