Fabulous birds in the river puzzle

It's fairly simple puzzle depicting birds. Before embarking on a collection of puzzle, you need to choose the difficulty level, the higher it is, the more pieces in the mosaic. After the start, all the pieces will be mixed, so you should study them carefully, you will probably find fragments from which the easiest to collect a puzzle - with right angles. If the fragment contains two straight lines - is one of the corners of the pictures, if a fragment has one straight line - is one of the circuit parts. Fragments can be interconnected.