Who is referred to as "the screech owl" in The Pigman by Paul Zindel?

Norton
calls Lorraine as "the screech owl" in by , and, in case there
is any doubt, it is not meant as a compliment. John is defensive and makes Norton pay for his
rude remark about Lorraine because he does not like Norton and because he
does like Lorraine. 

John has never liked Norton,
explaining that...