Are flying insects caught by certain kinds of birds while in flight?
During a summer evening (twilight), watch birds in flight for half an hour, such as swallows, night hawks, and fly catchers. Do they fly in a straight line or do they seem to go after certain things in the air? Why do you think they fly in such a manner? Do you ever see these birds eat seeds, plants or worms in a garden? Why not? 5. What is the food of spiders? Are they selective in what they eat? Capture a spider and place it in a glass bottle with a screen cover or a cover with a number of small holes. Do not place it in direct sunlight, as the heat will kill the spider. Catch a live fly, being sure not to crush or kill it. Place it inside the jar with the spider. What happened to the fly? Are spiders beneficial? Catch an insect such as a cricket or ground beetles and place it inside the jar with the spider. What happened? 6. Do certain insects eat other insects? Can lady beetles be used to control aphids? Locate a plant containing a large number of aphids or plant lice. Do you notic
