Keep getting this error : photos_public.gne:1 Uncaught SyntaxError: Unexpected token <

$(document).ready(function(){

  $('button').click(function(){

    $('button').removeClass("selected");  // remove any existing classes
    $(this).addClass("selected");         // add class

    var flickrAPI = "https://api.flickr.com/services/feeds/photos_public.gne?jsoncallback=?"; // Flickr API url with JSON
    var animal = $(this).text();


    var flickrOptions = {  
      tags : animal
    }

    function displayPhotos(data) {

      var photoHTML = '<ul>';

      $.each(array, function(i, photo){

        console.log(photo.media.m);

        // photoHTML += '<li class="grid-25 tablet-grid-50">';
        // photoHTML += '<a href="' + photo.link + '" class="image">';
        // photoHTML += '<img src="' + photo.media.m + '"></a></li>';

      });

      photoHTML += '</ul>';

      $('#photos').html(photoHTML);

    }; // end displayPhotos

    $.getJSON(flickrAPI, flickrOptions, displayPhotos);       // The JSON request

  }); // button function

}); // end ready