Due to Ukraine’s powerful air defenses, Russia has adjusted its drone tactics in its battle against it, forcing Russia to dispatch enormous waves of drones and Ukraine to organize mobile air-defense teams, but Ukraine is running out of ammo for its antiaircraft weaponry.

Russia has changed its drone tactics in its war against Ukraine due to the latter’s effective air defenses. Instead of launching a few kamikaze drones at a time, Russia now sends large waves of drones, routing them to avoid Ukrainian defenses. Ukraine’s interception rates have improved, leading Russia to save its production allocations until they have large amounts of drones. Ukraine has formed mobile air-defense teams equipped with short-range and portable weapons to counter the drones. The public has also been mobilized to report sightings of UAVs and missiles using an app. However, Ukraine is running out of ammunition for its antiaircraft weapons, especially surface-to-air missiles needed to counter Russian jets. 

Source: https://www.businessinsider.com/ukraine-air-defenses-force-russia-to-change-drones-attack-methods-2023-5