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Mealworms I will get as soon as possible, I know the Robins love them, I can put some inside the shed for them. For the Wren I had wondered about hanging a seed/fat ball from bedroom window but wondered if that would attract other birds and frighten the Wren away? I will get ones proposed and try to work out best place to put it,whether hang it from a window slightly further away from box to avoid disturbance. Cannot see how to give Wren mealworms on her own.