CNDDB News Blog

Today we celebrate rodents of the Sciuridae family which includes squirrels and chipmunks. With their bushy tail, small ears, and large eyes, it’s easy to see how these creatures with such cute features has captured the hearts of many humans throughout history.

The CNDDB tracks 10 members of the Sciuridae family:

Nelson's antelope squirrel (Ammospermophilus nelsoni)
San Bernardino golden-mantled ground squirrel (Callospermophilus lateralis bernardinus)
San Bernardino flying squirrel (Glaucomys oregonensis californicus)
Alpine chipmunk (Neotamias alpinus)
Kingston Mountain chipmunk (Neotamias panamintinus acrus)
Mount Pinos chipmunk (Neotamias speciosus callipeplus)
Lodgepole chipmunk (Neotamias speciosus speciosus)
Piute ground squirrel (Urocitellus mollis)
Mohave ground squirrel (Xerospermophilus mohavensis)
Palm Springs round-tailed ground squirrel (Xerospermophilus tereticaudus chlorus)

If you happen to see any of them please let us know via our Online Field Survey Form.

The quarterly update of the Barred Owl Observations Database is available in the BIOS Viewer for CNDDB subscribers. The barred owl database includes barred owl (Strix varia), Strix hybrid, and unknown Strix detections.

Many of the records represent incidental detections made during spotted owl surveys; therefore, this dataset may not accurately represent the current distribution of barred owls in California. Furthermore, this dataset is only available to CNDDB subscribers because it contains references to sensitive spotted owl locations. A public version will be available in the future.

For a copy of the geodatabase or for site-specific inquiries, contact the database manager at owlobs@wildlife.ca.gov

In December 2019, the Vegetation Classification and Mapping Program (VegCAMP) updated the “map of vegetation maps” in BIOS that shows footprints of fine-scaled vegetation maps: Vegetation (MCV/NVCS) Mapping Projects – California [ds515]. This dataset can help you discover what vegetation types are in your area of interest. California’s Natural Communities are based in the National Vegetation Classification System (NVCS), which is a hierarchical system; and VegCAMP works together with the California Native Plant Society (CNPS) to maintain California’s expression of the system. We publish a list of Natural Communities at the bottom two levels: alliance and association. We also work to rank these communities for rarity, using the same ranking concepts as are used for species in CNDDB. Our published Natural Community lists and other online information were also recently updated. For more information, please see VegCAMP's Natural Communities page (updated November 2019) and CNPS' Online Manual of California Vegetation (updated October 2019).

Where does ds515 come in? If you are working in an area and want to know what vegetation types have been documented there, you can see if there is a mapping project overlapping or near your area of interest. If you click on one of the polygons of ds515 in BIOS, you will see who is responsible for the map, whether it is complete, and how old it is. There are links in ds515 to download the datasets and view the classification and mapping reports. The classification reports have keys that will help you determine vegetation types based on species cover. Since many of the maps are produced at the alliance level, which is coarser than the association level, it is important to know how to identify associations. This is particularly true for those interested in determining whether there are sensitive natural communities present, because there can be sensitive associations within alliances that are broadly distributed that are not considered sensitive. To see ds515, along with other published vegetation datasets, including a newly published, updated map of the Delta (ds2855) and part of the Modoc Plateau (ds2858), please see our BIOS bookmark.