RIDGEFIELD It’s been a while since downtown Ridgefield has thrummed with this much activity, but on Saturday, local residents and out-of-town visitors flocked to the city for the annual BirdFest & Bluegrass festival. Shoppers strolling through the farmers market or along Pioneer Street were treated to music drifting out from storefront windows. Some stopped for a bite to eat at a food cart, while others opted for a full meal at a restaurant.