importance of nesting sanctuaries for wildlife. The film sells conser- 

 vation as a common sense measure and ends with a field day spon- 

 sored by a soil conservation district with demonstrations of many 

 new conservation techniques. 



AUDIENCE: Senior high; college; adult 



BLACK WIDOW SPIDER 



Color Sound Ken Middleham Productions 



11 minutes Sale 



Introducing one of the more menacing members of the insect 

 community, the Black Widow spider, this film makes an eloquent 

 appeal for her place in the ecological society. With extremely attrac- 

 tive and meticulous photography combining micro-film with 

 startling closeups, the camera illuminates scenes of the Widow 

 mating, construction of the egg sac, laying and hatching of eggs, 

 and the development of the spiderlings. The story expands to in- 

 clude certain natural enemies of the spider such as the praying 

 mantis and the alligator lizard but most dramatically it reveals as 

 the real enemy ... a tiny fly. The film in a relatively short span 

 of time dramatically illustrates the importance of biological control 

 in nature. Excellent introduction for young people to predation. 



AUDIENCE: Junior high; senior high; adult 



THE CHANGING FOREST 



Color Sound McGraw-Hill Book Company 



20 minutes Rental Sale 



This ecological story chooses as its setting a Canadian forest, and 

 begins with an introduction to the tree cycle. It highlights the active 

 competition which exists in such an environment among the wild- 

 life, and the reason for such competition, namely to effect an orderly 

 balance in the community. The tracing of tree progression and wild- 

 life change makes us aware of the analogy between forest and 

 human communities, the former being subject to certain changes 

 brought about by actions of man such as logging, cultivating, pastur- 

 ing, and the development of living facilities. The story notes also 

 the part played by seasonal changes in their effect upon the natives 

 of the forest environment. 



AUDIENCE: Junior high; senior high; college; adult 



