Why are young birds hatched with parent present while most young reptiles hatch long after parents have left the nest?

Young birds are typically hatched with parents present because they require immediate care, warmth, and feeding to survive in their early stages of life. Birds often have a more extended parental investment, ensuring that the chicks are nurtured and protected until they can fend for themselves. In contrast, many reptiles lay eggs and then abandon them, as their young are often more precocial, meaning they are born with a greater ability to survive independently. This evolutionary strategy allows reptiles to conserve energy and resources after laying their eggs.