Simplify the following text for a Grade 5 native English-speaking person.
Original: The Nightingale ( Luscinia megarhynchos ) , also known as Rufous and Common Nightingale , is a small passerine bird that was formerly classed as a member of the thrush family Turdidae , but is now more generally considered to be an Old World flycatcher , Muscicapidae .
Simplified: The Nightingale ( Luscinia megarhynchos ) is a small bird . It is also known as Rufous and Common Nightingale .