Here’s what I consider to be pretty much conclusive evidence that the behavior of creatures is not solely determined by genetics, and that environment has an impact: Caribbean birds. St. Lucia, the southern Caribbean island we are visiting, has many familiar bird species, but the conduct of the birds is definitely different from the conduct of the birds of the Midwest.
This pigeon-like bird rested on the guardrail of our cottage, about a foot away from me, for a long time this morning. Unlike jumpy central Ohio birds, he didn’t flutter off at any movement on my part. Instead, he confidently strutted up and down the railing, eyeing me with apparent disdain because I wasn’t eating anything that would yield a crumb or two for him to seize. His pugnacious attitude reminded me of the tough-guy pigeon gangs you see in New York City, or Paris.
The pigeon’s haughty ‘tude, however, was nothing compared to the sparrow-like birds that hang around the breakfast patio. Those little guys hop closer and closer to the food on the plate, undeterred by repeated shooing, until they finally dare to perch on the side of the plate and take a nibble of a half-eaten pastry. And when guest rise from their table, the birds descend in force and tear away every scrap of food they can get in their beaks like they own the place.
In the Midwest, birds are timid creatures who don’t want any part of interaction with humans. In the Caribbean, birds are aggressive in taking what they want, whether humans are nearby or not. And I have no doubt that if you transported Columbus birds to St. Lucia, they’d get roughed up a bit by the natives at first, but then would quickly learn that if they want to rule the roost, they’d better adopt the Caribbean approach and take what they want.