Birds sit on telephone wires against a blue sky. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3298678/free-photo-image-animal-bird-buildingsFree Image from public domain licenseOriginal public domain image from Flickr https://www.rawpixel.com/image/4027087/original-public-domain-image-from-flickrView licenseElectric transmission tower power lines. Free public domain CC0 image. https://www.rawpixel.com/image/6025884/photo-image-public-domain-post-technologyFree Image from public domain licensePower lines on electric transmission at night. Free public domain CC0 photo. https://www.rawpixel.com/image/6042220/photo-image-public-domain-post-technologyFree Image from public domain licenseElectric transmission tower power lines. Free public domain CC0 photo. https://www.rawpixel.com/image/6021153/photo-image-public-domain-post-technologyFree Image from public domain licenseWooden pole of a minor overhead power line, unidentified location. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3286721/free-photo-image-electricity-public-domain-poleFree Image from public domain license