Marian’s Wildlife Blog – June 2017

Joe-Pye Weed and Goldenrod by Marian Harman

While working in your yard this summer, you might want to identify the plants and determine if they are native or non-native species. Many non-native invasive plants are outcompeting our native plants with disastrous consequences for our native birds. Non-native honeysuckles are particularly problematic. National Wildlife Federation encourages us to remove them.

Fruit eating birds such as cardinals, catbirds and robins love their tasty red fruits, and spread their seeds far and wide. But these birds are generalists and can eat a wide variety of fruits. The result is that Asian honeysuckle covers huge swaths of land, smothering out our native plants. Honeysuckle berries are not very nutritious, and worse, the plant itself hosts few beneficial insects. Without beneficial insects, birds have much less to feed growing nestlings. Warblers and chickadees, for instance rely on hundreds of caterpillars per day to feed themselves and their young.

Douglas Tallamy, Professor of Entomology at the University of Delaware, has found that the number and diversity of plant-eating insects drops dramatically when exotic plants invade. Caterpillars comprise 90 percent of warbler and chickadee diets during the breeding season. Tallamy states, “We are so used to hearing disastrous environmental news, and it often seems there is little that one person can do. But I’ve been going all over the country saying that you can do something. You can change the plants in your yard.  read more…