def _get_count(node):
    """
    Get the count for the species seen.

    :param node: the tag for an entry in the list of species.

    :return: the number of birds seen or None if the species was present
    but not counted.

    """
    count = None
    tag = node.find('h5', class_='se-count')
    value = tag.text.strip().lower()
    if value != 'x':
        count = int(value)
    return count
