The information you send us helps to advance our knowledge of heron and egret nesting ecology and directly contributes to the conservation of their habitats. We share this knowledge by publishing in scientific journals, submitting technical reports to partner agencies, and by providing data to landowners, biologists, conservationists, and local and regional planning departments. Here is round-up of some of our Heron and Egret Project publications. For complete list of ACR's published research, see Audubon Canyon Ranch Scientific Contributions.

Ardeid Articles

Ardeid2018_SlowLocalRecovery  (PDF)
Slow Local Recovery: Disturbance ecology of herons and egrets 2018
Ardeid2018_AYearFollowingEgrets  (PDF) A Year Following Egrets: Insights from birds with GPS tags 2018
Ardeid2017_TheMovementEcologyofEgrets (PDF) The Movement Ecology of Egrets: Studying top predators to understand landscape habitat linkages 2017
Ardeid2016_ArdeidLandscapes (PDF) Ardeid Landscapes: Using statewide data to model the habitat needs of nesting herons and egrets by Emiko Condeso  2016 
Ardeid2014_WhereHaveAllTheEgretsGone (PDF) Where Have All the Egrets Gone? Recent events at the Martin Griffin Preserve heronry by Sarah Millus 2014
Ardeid2014-2_RipplesInThePool (PDF) Ripples in the Pool: Local shifts, indefinite cycles, and the future of herons and egrets in Bolinas Lagoon by John P. Kelly  2014
Ardeid2013_LifeOnTheEdge (PDF) Life on the Edge: The status of Black-crowned Night-Herons in the northern San Francisco Bay area by Emiko Condeso 2013
Ardeid2012_OutcastsOnTheWing (PDF) Outcasts on the Wing:Modeling the regional effects of disturbance at heron and egret colonies by Sarah Millus  2012
Ardeid2011_HeronsEgretsBeyondBayArea (PDF)  Beyond the Bay Area: Mapping Heronries in Coastal California. by Emiko Condeso and John Sterling  2011
Ardeid2010_HeronsInTheMistpdf (PDF) Herons in the Mist: How will heron and egret populations respond to regional climate change? by John P. Kelly  2010
Ardeid2009_ParentalWisdom (PDF) The Ecology of Parental Wisdom: Strategic nest attendance by Great Egrets, by John P. Kelly and Christine Rothenbach 2009
Ardeid2009_LocalValues (PDF) Local Values: A fine scale census of herons and egrets on Bolinas Lagoon, by Emiko Condeso  2009
Ardeid2008_NestingLandscapeProtection (PDF) The Protection of Nesting Landscapes: Wetland Conservation and the Health of Heronries, by John P. Kelly  2008
Ardeid2007_ForagingHorizons (PDF) Foraging Horizons: How Broadly do Herons and Egrets Search the Landscape for Food? by John P. Kelly and Mark McCaustland 2007
Ardeid2006_HeronryLifeSpan (PDF) What’s the Life Span of a Heronry? Habitat Protection and Nesting Colonies, by John P. Kelly  2006

Conservation Reports

Kelly_Robinson-Nilsen_2011_StateoftheBirds (PDF) State of the Birds: San Francisco Bay 2011  Jan 19, 2012 
State of the Estuary 2015-PROCESSES Heron and Egret Brood Size (PDF) Processes–heron and egret brood size indicator. Technical summary and appendix, in State of the San Francisco Estuary 2015: Status and Trends Update on 33 Indicators of Ecosystem Health, San Francisco Estuary Partnership. Feb 18, 2016 
State of the Estuary 2015-WILDLIFE Herons and Egrets (PDF) Wildlife–heron and egret nest density and nest survival indicators:. Technical summary and appendix, in State of the San Francisco Estuary 2015:Status and Trends Update on 33 Indicators of Ecosystem Health, San Francisco Estuary Partnership. Feb 18, 2016

Peer-reviewed Journal Publications

Rauzon_et_al_2019_Cormorants (PDF) Changes in abundance and distribution of nesting Double-crested Cormorants Phalacrocorax Auritus in the San Francisco Bay Area, 1975-2017 2019
Kelly_etal_2018_Waterbirds (PDF) Nesting Dynamics of Four Ardeid Species at Supregional Scales: Recovery Rates after Sudden Major Declines in Nest Abundance 2018
Kelly and Condeso 2014 (PDF) Rainfall Effects on Heron and Egret Nest Abundance in the San Francisco Bay Area  2014 
rothenbach_kelly_2012_condor_0 (PDF) The parental dilemma under variable predation pressure: adaptive variation in nest attendance by Great Egrets   2012 
Kelly_et_al_2007_Waterbirds (PDF) Status, Trends, and Implications for the Conservation of Heron and Egret Nesting Colonies in the San Francisco Bay Area  2007
Kelly_et_al_2008_Wetlands (PDF) Landscape Influence on the Quality of Heron and Egret Colony Sites  2008 

Posters from Scientific Conferences

2009StateofEstuary_ClimateChange (PDF) Effects of rainfall during winter and nesting seasons on the rate of change in heron and egret nest abundance and implications of climate change  2009 
2007StateofEstuary_AnnotatedAtlas (PDF)  Annotated Atlas and regional monitoring of heron and egret nesting colonies in the San Francisco Bay area 2007
2007StateofEstuary_LandscapeInfluences (PDF)  Landscape influences on heron and egret colony site selection, nest productivity, and foraging distribution in the San Francisco Estuary 2007
2005Calfed_LandscapeUse (PDF) Landscape use by herons and egrets in the San Francisco Estuary 2005