The description of small birds with black and turquoise in a bush suggests that you might be referring to the superb starling (Lamprotornis superbus). These striking birds are native to East Africa and are known for their iridescent plumage that includes shades of black, turquoise, and other vibrant colors.

Superb starlings often gather in bushes and trees, and their glossy plumage can create a beautiful display when caught in the sunlight. The black and turquoise colors, along with hints of purple and green, make them visually stunning.

It's worth noting that there are various bird species with similar coloration, so without more specific details or a visual reference, it's challenging to pinpoint the exact species. If you have more information or details about the birds you observed, feel free to share, and I'll do my best to provide further assistance!