Little brown bird

This bird visited my feeding station this morning. It was approximately the same size as a robin. It was completely uniform chocolate brown, no paler bits that I could see, no other colours, and no markings or bars. It could have been a robin but definately no red. It fed from a flat feeder tray containing mostly seed, and rooted about in some flower tubs. Sorry, no photos.

Can anyone suggest what is was?

Cheers, Linda.

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