Measuring the health of Mt. Tam

Maintaining a healthy, vibrant and diverse Mt. Tam begins with understanding how key ecological resources are faring, and how we can better care for this iconic and beloved place.

One Tam partners and Bay Area scientists have come together to try to answer the question: How healthy are Mt. Tam's natural resources?

Shrubland Birds

Shrubland Birds

Photo by Ken Schneider


The overall condition of shrubland-associated birds is Good.

Point Blue Conservation Science analyzed patterns of abundance from 1996 to 2013 to determine the trends for as many individual species as possible (see References below). Trends were determined for two of the six shrubland-associated species.

While the condition rating is Good, trends were Unknown for four species. Additional years of data, at more sites, could bolster the assessment for shrubland birds. Such an assessment is important given that shrubland species appear to be declining regionally.

Condition, Trend, and Confidence for Shrubland Bird Species Included in This Analysis


Point Blue Conservation ScienceState of the Birds San Francisco Bay 2011
Abundance Patterns of Landbirds in the Marin Municipal Water District: 1996 to 2013

Learn More


Cormier, R.L., Seavy, N.E., &  Humple. D.L.. (2014). Abundance patterns of landbirds in the Marin Municipal Water District: 1996 to 2013. Point Blue Report. Available here.

Pitkin, M. & Wood, J. (Eds). (2011). The State of the Birds, San Francisco Bay. PRBO Conservation Science and the San Francisco Bay Joint Venture. Available from: