Numbered nasal discs for waterfowl
Journal of Wildlife Management
By: J. C. Bartonek and C.W. Dane
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Abstract
Numbered nasal discs were successfully used in studies requiring large numbers of individually marked waterfowl. The procedure for constructing these discs is outlined. Blue-winged teal (Anas discors) with 5/8-inch discs, and canvasback (Aythya valisineria) and redhead (A. americana) with 3/4-inch discs can be individually identified up to 50 and 80 yards, respectively, with a gunstock-mounted, 20-power spotting scope. The particular value of these markers is their durability, the number of combinations possible, and the apparent absence of behavioral or mortality influence among such species as the blue-winged teal.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Numbered nasal discs for waterfowl |
| Series title | Journal of Wildlife Management |
| Volume | 28 |
| Issue | 4 |
| Year Published | 1964 |
| Language | English |
| Contributing office(s) | Northern Prairie Wildlife Research Center |
| Description | 5 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Wildlife Management |
| First page | 688 |
| Last page | 692 |
| Google Analytic Metrics | Metrics page |