No it is a common noun and should not have a capital letter.
(Many birdwatchers alsays capitalize bird names but this is grammatically incorrect.)
No, the noun 'toucan' is a countable noun the plural noun is toucans.
Un toucan (masculine noun).
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Pencil proper or common noun
Exxon is a proper noun
proper noun
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
proper noun
Proper noun
It is a proper noun, because it is the name of a specific thing.
what is trix
Proper noun or common noun