At this time of year the Cliffdale fields are whirring with insect activity.  Monarchs are getting ready for the fall migration, grasshoppers and crickets are leaping about, and mantids are stalking their prey.  Grab a net and see what you can find! Program takes place at Teatown’s Cliffdale Farm on Teatown Road, Croton on Hudson. All Welcome. Members Free, Non-members $7. Programs require pre-registration. To register, call 914-762-2912 x 110.