The writer's main point in the first paragraph is that corvids are highly intelligent birds, with intelligence comparable to that of primates. This is evident from their complex behaviors, such as tool use and social learning, which are often seen in primates.
: To conceal their true identity and test if crows would recognize the mask in different situations. The writer's main point in the first paragraph
(or Replicate) — Scientists successfully got Betty to perform the behavior multiple times. The Intelligence of Corvids IELTS Reading Answers The writer's main point in the first paragraph