castallia 5x5.jpg

General Wildlife Survey 

We have conducted surveys for amphibians, reptiles, birds, and mammals based on observation, tracks, sign, scat, and vocalizations.  Habitat suitability for species can also be assessed and a species list of potential species can be developed.

Special-Status Species Surveys

Johanna has a Recovery Permit for tidewater goby and California red-legged frog (TE 204436-1). David has a Recovery Permit for southwestern willow flycatcher, least Bell's vireo, and California gnatcatcher (TE 095868-1).  In addition to these species, they have worked with numerous other Special-Status Species and have been added to USFWS and National Marine Fisheries Service Biological Opinions for projects with potential impacts to federally listed species. 

                                       Link to Special-Status Species

Bird and Nest Clearance Surveys

The Migratory Bird Treaty Act (MBTA) has made it illegal to pursue, hunt, take, capture, kill or sell birds, their parts, or eggs.  Avoidance of nests with eggs is required under the MBTA and nesting birds can cause costly delays. In our experience, timing construction to avoid the breeding season is the only certain way to avoid nesting bird issues.  However, identifying potential issues before birds begin to nest can minimize costly delays. In addition, conducting regular nest searches to determine location of active nests and timing of fledging is an option if construction must occur during the breeding season.

Brown-headed Cowbird Management

Brown-headed cowbirds are obligate brood parasites and negatively impact the nesting success of other birds. David has approval from CDFW to conduct trapping for brown-headed cowbirds.  The trapping would usually be part of a mitigation plan for impacts to native birds and/or riparian habitat.