Discussion post on article critical review

Please make a discussion post based on the following:

Question to address:
Write one to two paragraphs answering: 
-What was the main hypothesis? 
-What are the main conclusions that you make from looking at the results? 
-What are the author’s main conclusions? 
-Were the authors conclusions justified? Do you agree/disagree with them? Why?
Write one to two paragraphs answering: 
-Zahavi proposed that communal roost serve as information centers, do the results from this study support Zahavis information center hypothesis? 
-Explain your answer. What methods did the authors use to test this hypothesis? What results did they find?
Please refer to the critical review form for information to complete this discussion post, as well as refer to the article pages I will upload.