To start out making the bird base it is always good to make creases so that subsequent folds are easier to make.
a) Place paper colour side down.
b) Fold bottom edge up to meet top edge, unfold.
c) Fold right edge over to meet the left edge, unfold.
d) Fold bottom left corner up to meet top right corner, unfold.
e) Fold bottom right corner to meet top left corner, unfold.
Tip: One of the keys to making great origami models is to be precise with your folding, making sure that the edges meet perfectly.