Updating with some more locations: Bass River Park (E Greenbrook Rd), Harrisville Pond, Franklin Parker preserve.
Cicada season started in New Jersey last week with the emergence and singing of Neocicada Hieroglyphica aka the Hieroglyphic cicada. I heard them in Brendan T. Byrne state park and Hammonton. Someone on our Instagram said he heard them in Vineland.
Cicadas.info which specializes in the cicadas of the Mid-Atlantic, has Hieropglyhic cicadas starting around June 8th — this makes sense because they’re found in Florida, as well as more northern states like New Jersey and New York (Long Island).
You can hear their high-pitched screams in this video:
Here is the molted skin of a Hieroglyphic cicada: