Increasing point-count duration increases standard error

Journal of Field Ornithology

Volumn 69, Issue 3, 1998, Pages 450-456

  Smith, Winston P ^a   Twedt, Daniel J ^b   Hamel, Paul B ^c   Ford, Robert P ^d   Wiedenfeld, David A ^e   Cooper, Robert J ^f,g  

^a PACIFIC NORTHWEST RESEARCH STATION   (United States)

^b PATUXENT WILDLIFE RESEARCH CENTER   (United States)

^c CENTER FOR BOTTOMLAND HARDWOODS RESEARCH   (United States)

^d Biodiversity Project Coordinator   (United States)

^e G M Sutton Avian Research Center   (United States)

^f UNIVERSITY OF MEMPHIS   (United States)

^g UNIVERSITY OF GEORGIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AVES; GALLIFORMES;

EID: 0032221528     PISSN: 02738570     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (23)

1. BUSKIRK, W. H., AND J. L. MACDONALD. 1995. Comparison of point-count sampling regimes for monitoring forest birds. Pp. 25-34, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
2. DAWSON, D. K., D. R. SMITH, AND C. S. ROBBINS. 1995. Point count length and detection of forest Neotropical migrant birds. Pp. 35-43 in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
3. FORD, R. P. 1990. Habitat relationships of breeding birds and winter birds in forested wetlands of west Tennessee. M.Sc. thesis. Univ. of Tennessee, Knoxville, Tennessee.
4. FULLER, R. J., AND D. R. LANGSLOW. 1984. Estimating numbers of birds by point counts: how long should counts last? Bird Study 31:195-202.
5. GUTZWILLER, K. J. 1991. Estimating winter species richness with unlimited-distance point counts. Auk 108:853-862.
6. -. 1993a. Refining the use of point counts for winter studies of individual species. Wilson Bull. 105:612-627.
7. -. 1993b. Avian responses to observer clothing: caveats from winter point counts. Wilson Bull. 105:628-636.
8. HAMEL, P. B., W. P. SMITH, D. J. TWEDT, J. R. WOEHR, E. MORRIS, R. H. HAMILTON, AND R. J. COOPER. 1996. A land manager's guide to point counts of birds in the Southeast. USDA For. Ser. Gen. Tech. Rep. SO-120, Southern Res. Sm., Asheville, North Carolina.
9. HUTTO, R. L., S. M. FLETSCHET, AND P. HENDRICKS. 1986. A fixed-radius point count method for non-breeding and breeding season use. Auk 103:593-602.
10. LYNCH, J. F. 1995. Effects of point count duration, time of day and aural stimuli on detectability of migratory and resident bird species in Quintana Roo, Mexico. Pp. 1-6, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Sin., Albany, California.
11. MANLEY, P. N., W. M. BLOCK, F. R. THOMPSON, G. S. BUTCHER, C. PAIGE, L. H. SURING, D. S. WINN, D. ROTH, C. J. RALPH, E. MORRIS, C. H. FLATHER, AND K. BYFORD. 1993. Guidelines for monitoring populations of Neotropical migratory birds on National Forests system lands. USDA For. Ser. Monitoring Task Group Rep., Wildlife and Fisheries Staff, Washington, D.C.
12. PETIT, D. R., L. J. PETIT, V. A. SAAB, AND T. E. MARTIN. 1995. Fixed radius point counts in forests: factors influencing effectiveness and efficiency. Pp. 49-56, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
13. RALPH, C. J., G. R. GUEPEL, P. PYLE, T. E. MARTIN, AND D. F. DESANTE. 1993. Handbook of field methods for monitoring landbirds. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-144, Pacific Southwest Res. Stn., Albany, California.
14. -, J. R. SAUER, AND S. DROEGE, Eds. 1995a. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
15. -, S. DROEGE, AND J. R. SAUER. 1995b. Managing and monitoring birds using point counts: standards and applications. Pp. 161-168 in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
16. ROLLFINKE, F. B., AND R. H. YAHNER. 1990. Effects of time of day and season on winter bird counts. Condor 92:215-219.
17. SMITH, W. P., D. J. TWEDT, D. A. WIEDENFELD, P. B. HAMEL, R. P. FORD, AND R. J. COOPER. 1993. Point counts of birds in bottomland hardwood forests of the Mississippi Alluvial Valley: duration, minimum sample size, and points versus visits. USDA For. Ser. Res. Paper SO-274, Southern For. Exp. Stn., New Orleans, Louisiana.
18. -, D. J. TWEDT, D. A. WIEDENFELD, P. B. HAMEL, R. P. FORD, AND R. J. COOPER. 1995. Sample size and allocation of effort in point count sampling of birds in bottomland hardwood forests. Pp. 7-17, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
19. THOMPSON, F. R., AND M. J. SCHWALBACH. 1995. Analysis of sample size, counting time, and plot size from an avian point count survey on Hoosier National Forest, Indiana. Pp. 45-48, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
20. VERNER, J. 1988. Optimizing the duration of point counts for monitoring trends in bird populations. Res. Note PSW-395. Pacific Southwest For. Range Exp. Stn., Berkeley, California.
21. -, AND L. V. RITTER. 1986. Hourly variation in morning point counts of birds. Auk 103: 117-124.
22. WELSH, D. A. 1995. An overview of the Ontario Forest Bird Monitoring Program in Canada. Pp. 93-97, in C. J. Ralph, J. R. Sauer, and S. Droege, eds. Monitoring bird populations by point counts. USDA For. Ser. Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Res. Stn., Albany, California.
23. ZAR, J. H. 1996. Biostatistical analysis. Third edition. Prentice-Hall, Upper Saddle River, New Jersey.