Three species of landbirds whose populations have grown, and three whose populations have declined on Marin Municipal Water District Lands on Mount Tamalpais since 1996, as surveyed by Point Blue Conservation Science.

Percent of locally nesting landbird species that are Increasing, decreasing, or stable on Marin Municipal Water District lands from 1996 to 2019. Point Blue Conservation Science has been tracking long-term trends of landbirds on Marin Municipal Water District Lands on Mount Tamalpais for over 20 years.

Percent of locally nesting landbird species that are Increasing, decreasing, or stable on Marin Municipal Water District lands from 1996 to 2019. Point Blue Conservation Science has been tracking long-term trends of landbirds on Marin Municipal Water District Lands on Mount Tamalpais for over 20 years.

Proportion of Northern Spotted Owl nest trees by species, from 1997 to 2018, for 584 nest sites monitored by Point Blue Conservation Science and the National Park Service throughout Marin County.

Proportion of Northern Spotted Owl nest trees by species, from 1997 to 2018, for 584 nest sites monitored by Point Blue Conservation Science and the National Park Service throughout Marin County.

Percent of Northern Spotted Owl pairs with known successful nests each year, as surveyed by the National Park Service and Point Blue Conservation Science. Data are collected on California State Parks, Marin County Parks, Marin Municipal Water District, Municipal, National Park Service, and private lands.

Percent of Northern Spotted Owl pairs with known successful nests each year, as surveyed by the National Park Service and Point Blue Conservation Science. Data are collected on California State Parks, Marin County Parks, Marin Municipal Water District, Municipal, National Park Service, and private lands.

Proportion of the 72 sites occupied by Spotted Owl pairs in 2018 by landowner or land manager, as surveyed by Point Blue Conservation Science and the National Park Service. Not all potential habitat is surveyed every year, so actual numbers of pairs per land management agency or owner may differ from these figures.