pattern - Sunset Parliament Sacrificing Posers

This was inspired when I tried to solve BmyGuest's Owls at sunset - find the odd one out

Similar to that group, these birds have gathered prior to a hunt albeit an evening hunt instead of a dawn foray. However, the Strigiformes gathered here have a different group system. Not only do they have different rules to follow, but they don't mess around with sho-who-whoing outsiders away. Imposters are torn to shreds and fed to the hawks as payment for staying out of the owls' hunting area. Sadly, this has not led to increased security. This group has two outsiders in their midst.

Can you identify the two owls behaving anti-socially (I.E. not following the parliament rules) in the image below? What is the rule?

A valid answer must contain the parliament rule and why those particular owls are not following it. The puzzle can be solved with a black-and-white printout of the image.

Note 1: In the column labels, I skipped the letter I on purpose to avoid confusion with the number 1. It is not a clue.

Note 2: BmyGuest found a valid pattern that I missed. The owls he found are, in fact, the odd birds out. I have since changed those two bird eyes such that they are still outside the intended pattern but no longer fall under the pattern BmyGuest found. I have delivered +1 to that answer nonetheless.

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The one two and only hints:

I added a row of owls simply because I liked how the pattern broke there. It doesn't really matter how many owls there are. The pattern holds up for any positive natural number of owls. Therefore, they must be following a pattern or series.

There are 64 possible eye pairs. Only 30 are valid and only 18 are used in the picture.

Answer

The odd ones out are

A2 and D7

Explanation:

The pattern is semaphore. Use the directions of each owl's eyes as the positions of the flags.

 HUSHLITTL
 OBABYDONT
 SAYAWORDM

 AMASGOING
 TOBUYYOUA
 MOCKINGBI
 RDITTHATM
 OCKINGBIR
 DWONTSING

These are the lyrics to the lullaby "Hush Little Baby".

A2 and D7 are the wrong letters. A2 should have looked south, northeast, and D7 should have looked south, east.