I'm wondering whether I should use the present tense for a descriptive statement but in a past context. For example:
(1) I went to the zoo and saw a giraffe last week. (2) Giraffe is a mammal with long neck. (3) It is the first time I see that animal with my own eyes.
Statement (2) is a description of a giraffe in general, not the specific one in the zoo, so is it correct to use is?
Statement (3) is an event that is still true now, so should I use is and see?
I'm not native speaker so forgive me if the question is very obvious to others.