Duolingo 150 Day Streak Animation

The animation begins with a golden egg shaking and cracking open to reveal Duo the owl, who bursts out and transforms into a fiery streak mascot wearing sunglasses. Large typography displaying '150 day streak' drops in with an elastic overshoot. Below, a weekly streak tracker slides up, checking off each day sequentially before the final day ignites with flame particles. Finally, action buttons slide up from the bottom. Tapping the 'Share Milestone' button triggers a smooth slide-up transition of a native-style share sheet featuring a custom milestone card and sharing shortcuts.