#grid-image-1 {
  background-image: url(../images/work/bird/1.jpg);
}

#grid-image-2 {
  background-image: url(../images/work/bird/2.jpg);
}

#grid-image-3 {
  background-image: url(../images/work/bird/3.jpg);
}

#grid-image-4 {
  background-image: url(../images/work/bird/4.jpg);
}

#grid-image-5 {
  background-image: url(../images/work/bird/5.jpg);
}

#grid-image-6 {
  background-image: url(../images/work/bird/6.jpg);
}

#grid-image-7 {
  background-image: url(../images/work/bird/7.jpg);
}

#grid-image-8 {
  background-image: url(../images/work/bird/8.jpg);
}

#grid-image-9 {
  background-image: url(../images/work/bird/9.jpg);
}

#grid-image-10 {
  background-image: url(../images/work/bird/10.jpg);
}

#grid-image-11 {
  background-image: url(../images/work/bird/11.jpg);
}

#grid-image-12 {
  background-image: url(../images/work/bird/12.jpg);
}

#grid-image-13 {
  background-image: url(../images/work/bird/13.jpg);
}


@media only screen and (max-width: 1000px){
  #grid-image-1,
  #grid-image-2 {
    grid-row: span 2 / auto;
  }

  #grid-image-3,
  #grid-image-4,
  #grid-image-5 {
    grid-row: span 1 / auto;
  }

  #grid-image-6,
  #grid-image-8,
  #grid-image-9,
  #grid-image-10,
  #grid-image-11,
  #grid-image-12,
  #grid-image-13 {
    grid-row: span 1 / auto;
  }

  #grid-image-7 {
    grid-row: span 2 / auto;
  }
}