The tiny light "bugs" encountered by the team are similar to those encountered by O'Neill, Teal'c, and a scientific expedition four years ago ("Prodigy"). They are likely not the same species, however; aside from residing in a different galaxy, they do not appear to be able to pass through solid matter (such as when the Wraith grabs them with his hand).The Wraith literally age their victims by draining their life energy. This can be done gradually and in stages, leaving a victim progressively older with each feeding. A Wraith feeding renders a victim (if he survives) paralyzed from the shoulders down. This is probably an effect of the chemical exchange that takes place through the Wraith's palm and fingertips -- a sort of venom deposited into a victim to render him immobile. It also allows the Wraith to leave a victim alive for more feeding later, without risk of its prey escaping. The Wraith refer to the Ancients as "Lanteans," perhaps a misunderstanding of or slang for the name "Atlantean." It is not clear if the Ancients themselves used this term of those who inhabited Atlantis.
Wraith can recover from multiple gunshot wounds incredibly quickly -- in as little as a few seconds. Dr. Beckett has theorized that a Wraith's ability to heal itself is directly proportional to how recently it has fed. The Puddle Jumper's energy shield may be equipped when the ship is on the ground, and activated by remote.
Sheppard's comment "Let's remember where we parked" as the Puddle Jumper cloaks is probably an homage to "Star Trek IV: The Voyage Home." Captain Kirk made a similar comment to the crew when they parked a cloaked Klingon ship in the middle of a twentieth century park. McKay later asks Sheppard, "What are you, Captain Kirk?" | 
