Some species of birds lay a parasitic egg in other bird species nests. Then this poor bird unknowingly raises and feeds these chick as her own unaware that they are not hers. As human mothers the majority of us would know our child without question.....right? Nicholas Barclay went missing in 1994 from San Antonio, TX, then was found 3 years later in Spain. The immediate family had no question this was their missing child, but soon things started to not quite add up.....