What two shotgun chokes are best for hunting small fast close birds?

Improved Cylinder (IC)

The Improved Cylinder choke is the most open choke available and is best suited for hunting small, fast-moving birds that are close to the shooter. The open pattern of the IC choke allows for a wider spread of shot, making it easier to hit fast-moving targets.

Skeet

The Skeet choke is also a good choice for hunting small, fast-moving birds. The Skeet choke is slightly more open than the IC choke and produces a wider pattern of shot. This wider pattern is ideal for close-range shooting where the target is moving quickly.