CSS3 Butterfly Animation

HTML

<div id="container">
    <div id="butterfly">
        <div id="leftwing">
        </div>
        <div id="rightwing">
        </div>
    </div>
</div>

CSS

div#butterfly{
    position absolute;
    left:0px;
    top:0px;
    width: 366px;
    height: 208px;
    
    -webkit-transform: rotate(-20deg)  translate(30px, 60px) scale(0.8, 0.8);
    -webkit-transform-origin: center center;
    -moz-transform: rotate(-20deg)  translate(30px, 60px) scale(0.8, 0.8);
    -moz-transform-origin: center center;
}

div#rightwing{
    position: absolute;
    left:0px;
    top:0px;
    width: 178px;
    height: 208px;
    background-image: url(http://www.eleqtriq.com/wp-content/static/demos/2010/css3d/img/wing.png);
    background-repeat:no-repeat;
    
    -webkit-transform: rotate3d(0, 0, 0, 180deg); /* Mirror left wing */
    -webkit-transform-origin: center right;
    -webkit-animation-name: rightwingani;
    -webkit-animation-duration: 8s;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-timing-function: ease-in-out;
    
    -moz-transform: rotate3d(0, 0, 0, 180deg); /* Mirror left wing */
    -moz-transform-origin: center right;
    -moz-animation-name: rightwingani;
    -moz-animation-duration: 8s;
    -moz-animation-iteration-count: infinite;
    -moz-animation-timing-function: ease-in-out;
}

@-webkit-keyframes rightwingani {
    from {
        -webkit-transform: rotate3d(0, 1, 0, 180deg);
    }
    30% {
        -webkit-transform: rotate3d(0, 1, 0, 180deg);
    }
    50% {
        -webkit-transform: rotate3d(0, 1, 0, 100deg);
    }
    70%{
        -webkit-transform: rotate3d(0, 1, 0, 180deg);
    }
    to{
        -webkit-transform: rotate3d(0, 1, 0, 180deg);
    }
}

@-moz-keyframes rightwingani {
    from {
        -moz-transform: rotate3d(0, 1, 0, 180deg);
    }
    30% {
        -moz-transform: rotate3d(0, 1, 0, 180deg);
    }
    50% {
        -moz-transform: rotate3d(0, 1, 0, 100deg);
    }
    70%{
        -moz-transform: rotate3d(0, 1, 0, 180deg);
    }
    to{
        -moz-transform: rotate3d(0, 1, 0, 180deg);
    }
}

div#leftwing{
    position: absolute;
    left:0px;
    top:0px;
   ...