Difference between passing JQuery.append.bind vs anonymous function to a Array.forEach loop

Question

I get two different behaviors out of these, I was hoping someone could explain why.

function Test( id ) {
           this.target = $(id);
           this.children = [ $('<div/>').text("A"), $('<div/>').text("B") ];
}

// will add 0 1 A B
Test.prototype.addToTarget = function() {
     this.children.forEach(this.target.append.bind(this.target));
};

// will add A B           
Test.prototype.addToTargetEx = function() {            
    var target = this.target;
    this.children.forEach(function(child){
        target.append(child);
    });
};