The authors investigated repeatability and co-variance of social behaviour in eastern water dragons. They then demonstrated the association between these behaviours and individual fitness. I congratulate the authors on submitting a very well-written manuscript which takes advantage of an extensive behavioural dataset. I believe the authors' question is relevant and of significant interest to the field.

I have no major concerns with the manuscript in its current form. While I share the previous reviewer's concern about MAF threshold, the authors have, in my opinion, satisfactorily justified their use of a higher threshold as it pertains to their parentage assignment, and I believe the number of post-filtering SNPs is high enough to inform robust analyses.

I have two point for the authors to consider should they wish to refine their manuscript further. It is not necessary that the authors address and respond to these points, as I believe the manuscript is informative and sound in its current form. Rather, these are small points for the authors to consider or disregard as they please:

1. The authors state that their study population is "highly habituated to human presence (Line 104). Habituated populations are, in my experience, less likely to terminate a behaviour in the presence of observers than those populations less exposed to human activity. Thus, the relative frequency of social behaviours compared to scouting or vigilance-based behaviours may be higher in habituated populations. Do the authors feel that a population described as "highly habituated" is representative of its species as a whole, and that the behavioural tendencies of this population would be shared by a thus far unobserved population studied in the same manner?

2. Did the authors consider the use of weighted degree as a descriptive metric of social behaviour? I believe weighted degree calculations could be informative, particularly as it pertains to individual reproductive success (Lines 335-343).

Minor comments:
-Line 327: "likely" is misspelled
-Line 340: There is a mid-sentence line break between "Figure" and "1"
-Line 342: "correlation" is misspelled