.sticky
{
    position: sticky;
    position: -webkit-sticky;
    top: 30px;
    font: 90px "Montserrat Alternates", sans-serif;
    font-weight: bold;
    color: #800009;
    text-align: center;
}

.sticky_bottom
{
    position: sticky;
    position: -webkit-sticky;
    top: 30px;
    font: 90px "Montserrat Alternates", sans-serif;
    color: #800009;
    text-align: center;
}

.sticky_birds_headline
{
    top: 30px;
    font: 50px "Montserrat Alternates", sans-serif;
    font-weight: bold;
    color: #800009;
    text-align: center;
    padding: 25px 0px 10px 0px
}

.sticky_birds_subhead
{
    top: 30px;
    font: 30px "Montserrat Alternates", sans-serif;
    color: #800009;
    text-align: center;
}

* {
    box-sizing: border-box;
}

.row_para {
    display: flex;
}

/* Create two equal columns that sits next to each other */
.column_para {
    flex: 50%;
    }

.block-1, .block-3
{
    height: 900px;
    padding: 70px 20px;
    background-size: 100%;
    background-image: url("../images/background/ibis02.jpg");
    box-sizing: border-box;
    background-position: center;
}
.block-2
{
    background: url("../images/background/gnatcatcher01.jpg") no-repeat fixed;
    background-size: 100%;
    height: 900px;
    background-position: center;
}
.block-3
{
    background-image: url("../images/background/vulture01.jpg");
}

.block-4
{
    height: 500px;
    /*padding: 70px 20px;*/
    box-sizing: border-box;
    background-position: center;
    }

#block-4a
{
    height: 500px;
    /*padding: 30px 5px;*/
    background-size: 100%;
    background-image: url("../images/accipitridae/baldeagle_01.jpg");
    box-sizing: border-box;
    background-position: center;
 }

#block-4b {
    height: 500px;
    /*padding: 30px 5px;*/
    background-size: 100%;
    background-image: url("../images/mimidae/mock_02.jpg");
    box-sizing: border-box;thrasher_02
    background-position: center;
}

.block-5
{
    height: 500px;
    /*padding: 70px 20px;*/
    box-sizing: border-box;
    background-position: center;
}

#block-5a
{
    height: 500px;
    /*padding: 30px 5px;*/
    background-size: 100%;
    background-image: url("../images/picidae/flicker_08.jpg");
    box-sizing: border-box;
    background-position: center;
}

#block-5b {
    height: 500px;
    /*padding: 30px 5px;*/
    background-size: 100%;
    background-image: url("../images/turdidae/robin_10.jpg");
box-sizing: border-box;
    background-position: center;
}

/* Turn off parallax scrolling for all tablets and phones. Increase/decrease the pixels if needed */
@media only screen and (max-device-width: 1366px) {
    .parallax {
        background-attachment: scroll;
    }
}