Felix Notus

Learn Bird Sounds 3× Faster

Master bird identification through spaced repetition

7-day free trial • Cancel anytime

Scientifically proven spaced repetition

Learn at your own pace

Track your progress

Access on any device

See It In Action

Learn bird sounds through interactive quizzes and visual comparisons

Listen & Guess

Learn the Answer

Compare Sounds

Help birders learn by contributing recordings, images, and expertise