A bird watcher or an aviphile (literally "Lover of birds"). For those with roots in Middle Earth, Aiwendil (Tolkeinian Elvish for "Lover of birds").
A person who takes care of fish is called an "aquarist" or a "fishkeeper." They are responsible for maintaining the health and well-being of the fish in their care by ensuring they have a suitable environment, feeding them properly, and monitoring their behavior.
A person who takes care of building a school is typically referred to as a contractor.
a person who rides elephants is called a mahout
The rearing of birds is called aviculture. Aviculture involves the breeding, care, and management of birds in captivity, often for commercial or conservation purposes.
Building Custodian.
A guardian takes care of his/her ward.
They are called a Menagerie Man.
a tree doctor
It is called a social worker
Falconer
Falconer
Falconer
The person who takes care of pets would be called a veterinarian (a.k.a vet)
a stablehand
The Purser and his staff, including Stewards
A person who takes care of fish is called an "aquarist" or a "fishkeeper." They are responsible for maintaining the health and well-being of the fish in their care by ensuring they have a suitable environment, feeding them properly, and monitoring their behavior.
A person who minds sheep is called a shepherd - which comes from sheep herder.A person who takes care of sheep - is a shepherd.