There are over 220 species of dobsonfly so you'll have to be more specific in telling us what you want to know.
4 inches long
No, we just caught one in my front yard. It is not extinct.
dobsonfly live near bodies of water for that most part, they spend most of their lives in the larval states as water creatures, when they grow up they live for only seven days or so and primarily live near the body of water from which they were born.
If it's the same thing we called a "helgermite" back when I lived in WV, it's actually called a Dobsonfly. They are a variety of insects native to the Americas, Asia and Africa.
Dobsonflies eat small bugs and some plants
A producer
A Dobsonfly is a large insect with long mandibles, prominent eyes, and clear wings. Males have long mandibles that resemble antlers, while females have shorter, stouter mandibles. They are usually brown or black in color and are known for their intimidating appearance.
Susan Hayward was married three times. Her first husband was actor and producer Jess Barker, whom she married in 1944 and divorced in 1954. She then married businessman and actor, and producer, and writer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and producer, and director, and director, and producer, and director, and producer, and director, and director, and producer, and director, and director, and producer, and director, and director, and producer, and director, and director, and producer.
A producer
producer it is a plant :)
Dobsonfly larvae, commonly known as hellgrammites, are primarily preyed upon by various aquatic predators, including fish such as trout and bass. They are also vulnerable to larger insects, amphibians, and birds. The larvae's habitat in freshwater environments makes them a key food source for these predators, contributing to the aquatic food web. Their tough exoskeletons can provide some protection, but they remain an essential part of the diet for many species.