Hydrologist
The proper name for the Jan pierewiet bird is the Bokmakierie. Its scientific name is Telophorus zeylonus.
An entomologist.
Marine biologist.
A person who studies the formations and changes of glaciers, is a glacier geologist.
Rhea
A language expert is commonly referred to as a linguist. Linguists study the structure and usage of language, including grammar, syntax, semantics, and phonetics.
If you don't know a bird expert, look it up in a Field Guide.
Yes, because 'fish' and 'bird' refers to a whole category of something, while a proper noun refers to a single entity(such as someone's name or the name of a city)
The proper name for the bird sometimes known overseas as a laughing jackass is the Laughing Kookaburra.
The proper name for the bird sometimes known outside of Australia as a laughing jackass is the Laughing Kookaburra.
avine, or more commonly, avian