 The invisible rail is thought to be monogamous , but little else is known of its courtship behaviour prior to nesting . A report of 4 – 5 striped chicks was long thought to be incorrect , since such a plumage is not normal for rails . In this family , chicks are typically precocial , downy and black , with any ornamentation confined to the head , bare flesh , or specially modified plume feathers . 
 The invisible rail is thought to be monogamous , but little else is known of its courtship behaviour prior to nesting . A report of 4 – 5 striped chicks was long thought to be incorrect , since such a plumage <a href='negative_concord' title='1'><mark>is</mark></a> <a href='negative_concord' title='2'><mark>not</mark></a>normal for rails . In this family , chicks <a href='drop_aux' title='3'><mark>are</mark></a>typically precocial , downy and black , with any ornamentation confined to the head , bare flesh , or specially modified plume feathers . 
The invisible rail is thought to b monogamous , but little else is known of its courtship behaviour prior to nesting . A report of 4 – 5 striped chicks was long thought to bbincorrect , since such a plumage ain't normal fa rails . In dis fam , chicks typically precocial , downy and black , with any ornamentation confined to the head , bare flesh , or specially modified plume feathers .