What can we learn from the word "v'Hikrivo"?
Rashi: This implies that one may even bring one bird as an Olah. 1
Moshav Zekenim citing Ri: This distinguishes offering Olas ha'Of from Chatas ha'Of (5:8). One must separate (the head from the body), even though it says "Lo Yavdil." 2
Moshav Zekenim citing Rosh: This Hakravah is bringing it up on the Mizbe'ach to do Melikah.
To which Avodah does "v'Hikrivo" refer?
Ramban: It refers to the Avodah of bringing the Olah up on to the Mizbe'ach, 1 where he then performed the Melikah.
Rendering the word "ha'Kohen" that follows superfluous - seeing as a Zar was prohibited from ascending the Mizbe'ach.
Why does the Torah insert the word "ha'Kohen" in the Pasuk?
Rashi #1 and Ramban: To teach that Melikah (piercing the neck of the bird) 1 must be performed with their fingernails, and not with a knife.
On the lower part of the back of the neck, cutting through the nape of the neck and severing the two pipes (Rashi and Rashbam).
What is the meaning of "v'Nimtzah Damo
Rashi: He presses the Oref against the wall of the Mizbe'ach until the blood drips down the wall.
Why does the Torah invert the order of the phrases "v'Hiktir ha'Mizbeichah" and "v'Nimtzah Damo"?
Rashi #2: The Kohen performs Melikah and burns the bird on the Mizbe'ach, at which point the blood has already been squeezed on the wall of the Mizbe'ach.
In other words, the head must be severed from the body already via the Melikah.
See Ramban, who interprets the Midrash differently.
Seeing as they are burned separately - He first burned the head after removing the crop; then he split the body (See Pasuk 17) and burned it (Ramban).
Why is the blood squeezed against the Mizbe'ach?
Moshav Zekenim, Da'as Zekenim 1 : A bird has little blood. If it would be collected in a Kli, some would stick to the Kli, and perhaps not enough would remain to throw on the Mizbe'ach.
It seems that also Hadar Zekenim (13) says so, just there is a printing mistake.
Rashi writes that v'Hikrivo teaches that one may even bring one bird for an Olah. Why would I think not?
Moshav Zekenim: If one found a nest with two doves, and said that he will bring them for a Korban, and one of them went away 1 , the verse teaches that he brings the second for a Korban.
Sifsei Chachamim: The previous Pasuk implies that one must bring at least two.
One might have thought that he cannot fulfill his words, so he is exempt. (PF)
Why did the Torah command to do Melikah with the fingernail, and not with a knife?
Moshav Zekenim citing Ri: Normally, this is Neveilah; this is so it will be known that one does so 1 only with Kodshim.
Moshav Zekenim: If he would do Shechitah, some blood would fall on the ground, and it could not be squeezed against the Mizbe'ach. If he would collect the blood in a Kli, some would be absorbed.
Rashi writes (from Zevachim 65a) that it cannot be that he burns the head on the Mizbe'ach before squeezing the blood on the wall. Why not?
Rashi (Zevachim 65a): All the blood must be squeezed, including what is in the head.
Moshav Zekenim: There is never Haktarah before Kaparah through the blood.