$animals : platypus, rhinoceros, llama, duck, duck;
$remove : duck;

@each $animal in $animals {
	.animals .#{$animal}-icon {
		background-image: url('/images/#{$animal}.png');
	}
}

remove($animals, $remove, space);

@each $animal in $animals{
	.exotic-animals .#{$animal}-icon {
		background-image: url('/images/#{$animal}.png');
	}
}
