Conservation biologist Dr. Richard Primack will give a talk on climate change and bird migration patterns on Wednesday, August 20 at 7:30 p.m. at the Polly Hill Arboretum. A favorite sign of spring is the arrival of the migratory birds we await each year. There are signs that these birds are returning earlier each year in Massachusetts. The evidence is in our own backyards.

Dr. Primack will discuss further evidence of how global warming and urban development is disrupting the seasonal routines of the natural world. Can plants and animals adapt to the change? Using historical records, journals from avid birdwatchers, and other research and fieldwork, Dr. Primack will focus the impact of climate change on bird migration, breeding behavior, and blooming times and the potential impact on our natural communities. Tickets are $8, or $5 for arboretum members. For details, call 508-693-9426.