PRESENCE - Estimates patch occupancy rates and related parameters. This work is in collaboration with Darryl MacKenzie, and is largely funded by the Amphibian Research and Monitoring Initiative (ARMI). Contact Darryl if you would like to learn more about this project.

Current Version: 13.18


book cover image MacKenzie, D. I., J. D. Nichols, J. A. Royle, K. H. Pollock, L.L. Bailey, and J. E. Hines. 2018. Occupancy Estimation and Modeling - Inferring Patterns and Dynamics of Species Occurrence. 2nd Edition. Elsevier Publishing.
ecology image MacKenzie, D. I., J. D. Nichols, G. B. Lachman, S. Droege, J. A. Royle and C. A. Langtimm. 2002. Estimating site occupancy rates when detection probabilities are less than one. Ecology 83(8): 2248-2255 ecology image MacKenzie, D. I., J. D. Nichols, J. E. Hines, M. G. Knutson and A. B. Franklin. 2003. Estimating site occupancy, colonization and local extinction probabilities when a species is detected imperfectly. Ecology 84(8) 2200-2207.
ecological Applications image Bailey, L. L., J.D. Nichols and J.E. Hines. 2007. Exploring Sampling Design Trade-Offs In Occupancy Studies With imperfect detection: examples and software. Ecological Applications, 17(1). pp. 281-290. methods in ecology and evolution image Guillera-Arroita, G. and J.J. Lahoz-Monfort. 2012. Designing studies to detect differences in species occupancy: power analysis under imperfect detection. Methods in Ecology and Evolution 2012, 3, 860-869.



Current Version: 13.18
PRESENCE (includes GenPres)
PRESENCE (includes GenPres, no install/setup program)
RPresence binary package for Windows
RPresence source package for OSX/Linux

Recent Modifications

Ver 13.18 (03Dec2021) - Add MacKenzie alpha param to 2sp model
Ver 13.17 (25Oct2021) - fix multi-season multi-state model
Ver 13.16 (20Oct2021) - Add dyn.occ 2nd parm to RPresence
Ver 13.15 (182Oct2021) - fix gof bug (gof not run in Presence)
Ver 13.14 (12Oct2021) - Increase max cov name length from 64 to 64000
Ver 13.13 (30Aug2021) - fix bug in RPresence 2sp model reversed psiBA, psiBa
Ver 13.12 (11Aug2021) - fix bug in RPresence 2sp model output of real psiBA estimates
Ver 13.11 (31Mar2021) - make 2sp model print all phis
Ver 13.10 (05Jan2021) - fix error in multi-season spatial-dep model 

PRESENCE workshops

Information about upcoming workshops on the use of Occupancy modeling using PRESENCE can be found at: