Answer...

Ans is 96 cm..
head=12
body=12+12+24=48
body=tail(head+1/2 body)+head
so head+head is equal to the another half of the body...
tail=12+24=36
bird length=head+body+tail
=12+48+36
=96cm..wahahahaha the final answer..XD
hu passer-by sia...O_o
i believe gt 70% is wei guang..
30% is i dunno hu..

my laptop is still under maintance...
so i nt on9-ing pretty often...
some more..i wed n fri ..gt work...5pm-11pm..