Ibis is one of a batch of 49 Gabbiano-class corvettes constructed for the Regia Marina and the Kriegsmarine in the course of World War 2. She was commissioned in April 1943 and remained in service until July 1971; nowadays, she can be seen at the Italian navy base in La Spezia. Details of the class may be found in Wikipedia, at https://en.wikipedia.org/wiki/Gabbiano-class_corvette.
From that Wikipedia entry: The Gabbiano-class corvettes were a group of 59 vessels ordered for the Regia Marina of Italy for service during the Second World War. They were built to a war-time design and intended for anti-submarine and escort duties.

Design
The Gabbianos were designed to be built quickly and in large numbers and began to enter service in May 1942. The ships were fitted with sonar and hydrophones, but the Regia Marina did not consider removing features such as torpedo tubes to reduce topweight or allow the vessels to carry more anti-submarine weapons.[2] These ships were equipped with electric 'creep' motors with an endurance of 16 nautical miles (30 km; 18 mi) at 6 knots (11 km/h; 6.9 mph) for silent running while engaged in anti-submarine searches,[3] Overall, they were well-designed for operations in the Mediterranean and were successful in their role.

Service
Sixty vessels were ordered, and 29 were completed by September 1943. The Germans seized many of these vessels after the Italian surrender in 1943, and operated them under new names until the end of the war. The Germans also completed 20 vessels under construction. Fourteen vessels survived the war; the postwar Marina Militare used them as patrol vessels until 1972.

Italian Navy "Ape" class corvette, decommissioned in 1972.