 " El Pajaro <unk> <unk> " was a Colombian song written by Eliseo Herrera which was very popular in El Salvador during the qualifying stages of the 1970 World Cup . During a radio show , Mauricio <unk> parodied the song , which he named " Arriba con la Selección " . That parody became so famous that it became the " official anthem " of the El Salvador national football team . 
