Senbazuru (line)
Model by Unknown / traditional.
Renzuru model of a line of cranes joined tail to wing and wing to head.
A longer line can be created; four cranes by using a 1:4 rectangle, five cranes by using a 1:5 rectangle, etc.
This model can be folded with a thin (crane) or thick (flapping bird) neck and tail. The thin version is more difficult.
Paper & size
When folded from a 24cm by 8cm rectangle, the resulting model ends up 15cm long, 5cm wide and about 2.5cm in height and contains three cranes.