Thank you for that identitication. From Wikipedia:
"Ranatra is a genus of generally slender predatory members of the family Nepidae, known as water stick-insects or water scorpions. Their front legs are strong and are used to grasp prey. They breathe through a pair of long breathing pipes extending from their tails. They eat tadpoles, small fish and other insects, which they pierce with their beak and inject a saliva which both sedates and begins to digest their prey. They overwinter as adults, and lay eggs in spring. The females lay eggs in vegetation. The eggs take typically two to four weeks to hatch, and the young take about two months to mature. When full grown they are 4-5 in."
And it may bite if handled!