Simplify the following text for a Grade 7 native English-speaking person.
Original: ( quadrupeds , birds , fishes ) folio , 1551-1558 , at ZÃ 1\/4 rich , a fifth ( snakes ) being issued in 1587 ( there is a German translation , entitled Thierbuch , of the first 4 vols . , ZÃ 1\/4 rich , 1563 ) : this work is the starting-point of modern zoology .
Simplified: ( quadrupeds , birds , fish ) folio , 1551 â `` 1558 , at ZÃ 1\/4 rich , a fifth ( snakes ) being issued in 1587 . This work is the starting-point of modern zoology .