cartoon birds perched branches, colorful feathers, cute avian characters. four stylized songbirds

cartoon birds branches colorful feathers cute avian characters stylized songbirds illustration nature design whimsical wildlife art vector yellow blue orange leaves isolated perched perching sitting birdwatching ornithology cheerful graphics animal theme vibrant fauna simplicity childish playful collection set creative friendly charming decorative adorable springtime environment ecology beak tail wings foliage four themed white background lovers flat