This video from the USA says about itself:
House Wren Song
16 May 2016
Male House Wren has claimed a nest box and has a mate and spends much of the day loudly singing his upbeat gibberish song for all backyard birds to hear. These are delightful little birds to have around as they constantly scold anyone who enters “their territory” while mating and raising their young. Often producing two broods a season these little birds eat a prodigious amount of insects and spiders.