Descriptor
| Ornithology | 2 |
| Biology | 1 |
| Conservation (Environment) | 1 |
| Ecological Factors | 1 |
| Ecology | 1 |
| Forestry | 1 |
| Instructional Materials | 1 |
| Natural Resources | 1 |
| Reference Materials | 1 |
| Wildlife Management | 1 |
Source
| National Wildlife | 2 |
Author
| DeGraaf, Richard M. | 1 |
| Grussing, Don | 1 |
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Grussing, Don – National Wildlife, 1977
Information on the design of various types of bird houses is provided. A very useful chart summarizes construction information, colors to use, placement, and locations that will be effective. (RH)
Descriptors: Instructional Materials, Ornithology, Reference Materials
DeGraaf, Richard M. – National Wildlife, 1978
There are numerous bird species that will nest only in dead or dying trees. Current forestry practices include clearing forests of these snags, or dead trees. This practice is driving many species out of the forests. An illustrated example of bird succession in and on a tree is given. (MA)
Descriptors: Biology, Conservation (Environment), Ecological Factors, Ecology
