At what age may increased aggression toward humans develop in eyas Red-tailed Hawks?

In eyas Red-tailed Hawks, increased aggression toward humans can typically develop during the third year of their life. This behavior often correlates with reaching sexual maturity. By this time, these hawks may begin to exhibit more territorial and defensive behaviors as they establish themselves in their environment and prepare for potential mating. It's during this stage that they may feel the need to assert dominance or protect their territory, which can manifest as increased aggression towards perceived threats, including humans.

Younger birds, in their first and second years, are generally still in their development phase and are not yet fully mature, both physically and behaviorally. Their interactions may be more exploratory, and they are typically less aggressive. Hence, while aggression can occur in earlier years, it is not as pronounced or frequent as it is in their third year when they are more established in their social and ecological roles.