A baby just a few hours old was abandoned in a park on Thursday.
Police have released pictures of the £1 Matalan T-shirt and grubby blanket the boy was wearing when he was found as they desperately search for the mother.
The newborn was discovered by a dog walker at around 5.30pm on Thursday in a community park known locally as The Mound, in Kings Norton, West Midlands.
He was immediately taken to hospital where he remains and is "doing well".
West Midlands Police said they are “extremely concerned” for the mother's welfare.
The force released pictures of the Matalan clothes the boy was wearing when he was discovered wrapped in a grey-and-white zig-zag patterned blanket.
He had an orange striped T-shirt with a picture of a dinosaur on the front below the words ‘Dino Dude’ and grey bottoms.
Detective Superintendent Annie Miller said: "The boy was full term and had most likely been born that day.
"Luckily he hadn't been there for very long because he was found by a dog walker who immediately raised the alarm.
"The boy is in hospital and doing really well.
"Our primary concern is the well-being of the mother and we need to find her to check on her physical and mental health.
"Her baby is fine and in good hands, but the most important person in his life is his mother and it's our priority to find her.
"We need to know she's safe and how she is medically, after giving birth.
“Ideally we'd like the mother herself to come forward, but are also appealing to the family and friends of the woman to come forward, if they know anything."
Police have not commented on the ethnicity of the baby but are seeking a white woman in her early 20s who was seen at the time the baby was abandoned.
Officers are also examining CCTV footage from the area in the hope of establishing the whereabouts of the mother.
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