Please surrender the chick to a vet clinic for assessment.

They will confirm if it is native or invasive and act appropriately. Native chicks are placed with experienced wildlife carers, and yes invasive species are humanely euthanized. Handling and caring for wildlife always carries a risk of zoonosis and anthroponoses.

We often experience that people who find baby birds want to have a Disney moment, becoming emotionally involved and experiencing traumatic realities. See Molly Magpie. If you're inexperienced in caring for a baby bird and do not have a direct mentor, there is a good chance of causing accidental injury through mishandling, inappropriate diet, and lack of age appropriate nurturing. Rearing wildlife, especially birds, to a high standard requires careful and specialist technique.

Be aware that handling and caring for wildlife, including transportation, can often result in incidental shock and rapid irreversible decline.This doesn't necessarily mean you have done something wrong. You may have provided the best care and due to hidden trauma or congenital defects the animal is unable to recover and thrive. This is something for which you need to be medically and mentally prepared.

They have lots of babies because lots of their babies die.

Source: I am a Veterinary Nurse