If you plant it, they will come. That is, if you plant native trees and shrubs, insects that make caterpillars will eat their leaves. Then birds will come to eat the caterpillars, and biodiversity will flourish, and life, including human life, will thrive. If you plant introduced species, the native insects and birds, who have not developed a relationship with those plants, will not eat them. They will move away, or die. Remove enough species of plant, insect, and animal, and the complex ecological web can collapse.
This is already happening, as suburban lawns, being expanses that provide almost no food for wildlife, are nearly lifeless. Even worse, some introduced plant species become invasive, and spread out into the woods and fields, turning them into lifeless monocultures as well.
Until recently, most people have thought we could save nature by setting aside parks. But, Douglas Tallamy says, as human populations grow, and parks shrink, there is not enough pristine nature left. The parks are too small, and too isolated. We need connectivity, so that wildlife populations can find each other and mate. What we need is for nature to not just be in parks, but everywhere, even in the places humans call home.
For ages, people have thought of themselves as separate from nature. Nature is something that is out there somewhere. And that’s the way most people like it. People do not really want bugs, squirrels, or other animals where they live. The author says his own son called him, saying, “Dad, what do I do? I have foxes living under my porch.” Tallamy told him to rejoice. The son said, “But they might eat my kid.” If the naturalist’s own son doesn’t want to live with wildlife, imagine what a hard sell it will be with the home owner’s association.
Tallamy believes this will change. He believes even people who don’t care about plants or animals will come to realize that in saving nature we will save ourselves. I hope he’s right. Change can be hard, and people can cling pretty hard to “the way we’ve always done things.”
But Tallamy’s hope is infectious. He has hope because what he proposes is easy and it works. He says he has seen with his own eyes rare species of birds nesting in yards, when they were thought to only live in the deep woods, as long as they are provided with the right plants. He recommends people shrink the size of their lawns by half. The rest should be planted in native trees and shrubs. He says oak and cherry are the best, but refers readers to the websites of the National Wildlife Foundation and the Audubon Society for lists of species for your specific area.
He says not to be afraid of planting trees too close together. They grow close together in the forest, and when their roots entangle with each other, they hold each other up. There should be loose soil or low-growing plants under the trees, where the insects can pupate, to complete their life cycle. It’s also important to grow flowers for the pollinators, and provide homes for them. A source of bubbling water is a magnet for birds.
Tallamy says that if even one person plants their yard this way, it will help. But if a few do it, and a few more, and a few more, it will be the equivalent of a national park. He calls it Homegrown National Park. I was halfway there already. I call my own yard my Backyard Nature Preserve. I have fruit trees and berry bushes. I let the milkweed and the goldenrod grow. The dawn chorus is deafening on summer mornings. But I didn’t know about the importance of caterpillars in the food web. I didn’t know about the importance of pupation sites.
Tallamy says his idea of a Homegrown National Park is “Nature’s Best Hope.” I hope as well. I hope he’s right, and I hope it works, and I hope the lovers of neatly manicured lawns can be convinced to try something new.
Addendum: I read this book in 2020, the year after it was published. Now, in 2024, I realize that this book has become hugely influential, one of the books that has changed the world. The idea of planting native plants in our home yards has really taken off. People are asking, "Is this native?" and nurseries specializing in native plants have sprung up. Some people remain blissfully unaware, devoted to their grandparents' garden plants. Others have become obnoxious purists, devoted to ripping out every non-native plant, even the well-behaved ones, which is almost certainly not necessary. But the message has spread, and many more people are planting many more native plants than ever before. And there surely are pollinators and birds alive today that would not have been alive had Tallamy not published this book. Perhaps someone else would have stepped up and published something similar. After all, the message is true, and the truth will out. But still, this book is The Origin of Species, the Wealth of Nations, Principia Mathematica, Silent Spring, one of those books your teachers told you about in school. Because Douglas Tallamy has changed, and is changing, the world.