At the
birds base form
is some standard continuations,
which it is also possible to be called as the base forms.
First it is possible
simply turn over the birds base.
From such base form
can be folded the classical model of
raven and
pheasant.
Secondly
it is possible to stretch two opposite pointed elements.
Similar idea was used
by H. Afonkin to fold combine velociraptor.
Besides,
it is possible to fold by wings a bird as follows.
o begin the models of
the dragon by Peter Budai and several other animals.
And, at last,
it is possible squash the top triangle.
So it is possible to fold giraffe by Peter Iangel.