             to {
                    opacity: 1;
                }
            }

            #birds {
                position: absolute;
                left: 56.8%;
                top: 27.4%;
                width: 35%;
                height: 33.7%;
                z-index: 100;
                -webkit-animation: fadein_birds 1s;
                -moz-animation: fadein_birds 1s;
                -ms-animation: fadein_birds 1s;
                -o-animation: fadein_birds 1s;
                animation: fad