Well done. All correct. 
The Dusky Gull threw me, because it’s better known as the Lava Gull and it took me ages to find out that it was also known as Dusky! 
I was originally thinking of the Daisy Tree, hence my query about the A!
Anyway, I know quite a bit about the flora and fauna of the Galapagos now! 
You and me both - can’t beat a bit of educational research and learn snippets such as the Carpenter Bee is the only type of bee on the islands. The dusky gull - a great name. )
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question! 
What does this say, and what is the answer?
- / - - - / - - - - - - / - - - - / - - - - - / - - / - - - - /
-
- / - - - - - - - - - - - - ,/ - - - / - - - - / - - / - - - - - / - - / - - - - - - - - - - - ./
-
-
-
- / - - / - ?
-
-
Letters used:
Unused:
A double puzzle, how exciting!
Let’s start with an S please
May we follow that S with a T please. 
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
- / - - - / T - - - - - / - - - - / T - - - - / T - / - - - - /
-
- / - - S - - - - - - - - - ,/ - - - / - - - - / T - / T - - - - / - - / - - - - - - - - - - - ./
-
-
- T / - - / - ?
-
Letters used: T, S
Unused:
M please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
- / - - - / T - - - - - / - - - M / T - - - - / T - / - - - - /
-
- / - - S - - - - - - - - - ,/ - - - / - - - - / T - / T - - - - / - - / - - - - - - - - - - - ./
-
-
- T / - M / - ?
-
Letters used: T, S, M
Unused:
O please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
- / - - - / T - - - - - / - - O M / T - - - - / T O / - - - - /
-
- / - - S - - - - - - - - - ,/ - - - / - - - - / T O / T - - - - / - - / - - - - - - - - - - - ./
-
-
- T / - M / - ?
-
Letters used: T, S, M, O
Unused:
R please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
- / - - - / T R - - - - / - R O M / T - - R - / T O / - - R - /
-
- / - - S - - - - - R - - - ,/ - - - / - - R - / T O / T - - R- / - - / R - - - - - - R - - - ./
-
-
- T / - M / - ?
-
Letters used: T, S, M, O, R
Unused:
can i have an A please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
- / - A - / T R A - - - / - R O M / T - - R - / T O / - - R - /
-
- / - - S A - - - A R - - - ,/ A - - / - - R - / T O / T - - R- / - - / R - A - - - A R - - - ./
-
- A T / A M / - ?
Letters used: T, S, M, O, R, A
Unused:
can i have an I please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
I / - A - / T R A - - - / - R O M / T - - R - / T O / - - R - /
-
- / - I S A - - - A R I - - ,/ A - - / - - R - / T O / T - - R- / - - / R - A - - - A R I - - ./
-
- A T / A M / I ?
Letters used: T, S, M, O, R, A, I
Unused:
G please
This is a double puzzle.
You have to get the letters for the two sentences as usual.
The second sentence is a question, based on information in the first sentence.
As well as working out the sentences, you also have to answer the question!
What does this say, and what is the answer?
I / - A - / T R A - - - / - R O M / T - - R - / T O / - - R - /
-
- / - I S A - - - A R I - G,/ A - - / - - R - / T O / T - - R- / - - / R - A - - - A R I - G./
-
- A T / A M / I ?
Letters used: T, S, M, O, R, A, I, G
Unused:
I can travel from there to here by disappearing, and here to there by reappearing.
A time traveler