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Quino Checkerspot Butterfly Survey Report

June 3, 2015

Prepared for: Prepared by: Jackson Pendo Development Company HELIX Environmental Planning, Inc. for GDCI Proctor Valley, LP 7578 El Cajon Boulevard, Suite 200 2245 San Diego Avenue, Suite 223 La Mesa, CA 91942 San Diego, CA 92110

Otay Ranch Proctor Valley Village & Preserve Quino Checkerspot Butterfly Survey Report

I certify that the information in this survey report and attached exhibits fully and accurately represent our work:

Jasmine Bakker Erica Harris Sally Trnka TE-778195 TE-778195 TE-778195

Stacy Nigro Jim Rocks Melanie Rocks TE-778195 TE-063230-4 TE-082908-1

Brian Lohstroh Lee Ripma Garrett Huffman TE-063608-5 TE-221290-3 TE-20186A-1

Melanie Dicus Darin Busby Laurie Gorman TE-049175-3 TE-115373-3 TE-233367-2

Victor Novick Travis Cooper Alicia Hill TE-069534-2 TE-170389-5 TE-06145B-0

Otay Ranch Proctor Valley Village & Preserve Quino Checkerspot Butterfly Survey Report

TABLE OF CONTENTS

Section Title Page

1.0 INTRODUCTION ...... 1

2.0 METHODS ...... 1

3.0 RESULTS ...... 2

4.0 REFERENCES ...... 4

LIST OF APPENDICES

Letter Title

A Survey Information B Survey Forms and Field Notes C Butterfly Checklist

LIST OF FIGURES

Follows Number Title Page

1 Project Vicinity Map ...... 2 2 2015 Quino Checkerspot Butterfly Habitat Assessment ...... 2 3 2015 Quino Checkerspot Butterfly Survey Area and Host Plant Locations ...... 2

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ii 1.0 INTRODUCTION

This report documents the results of HELIX Environmental Planning, Inc.’s (HELIX’s) 2015 Quino checkerspot butterfly (Euphydryas editha quino; QCB) survey of the Proctor Valley - Otay Ranch Village 14 Project site. HELIX biologists performed the protocol survey (comprising seven site visits) under HELIX’s Threatened/Endangered Species Permit No. TE778195. Consultants (Busby Biological Services, Inc. and Rocks Biological) conducted surveys under their individual permits (please refer to the title page for a complete list of individual permit numbers).

The Project site is located predominantly within the County of San Diego and portions of the City of Chula Vista in southwestern San Diego County, California in an area commonly known as Proctor Valley. It is further located within Sections 17, 18, 19, 20, 25, and 30 of Township 17 South, Range 1 West and 1 East of the U.S. Geological Survey (USGS) 7.5-minute Jamul Mountains quadrangle map (Figure 1). The Project site and associated study area are situated along Proctor Valley Road and are southeast of San Miguel Mountain, north of Upper Otay Reservoir, and west of the Jamul Mountains. The Project site also includes portions of the California Department of Fish and Wildlife Rancho Jamul Ecological Reserve located in Otay Ranch Village 14. Elevations range from approximately 560 to 1,320 feet above mean sea level. Vegetation communities within the study area consist primarily of chamise chaparral, coastal sage scrub, non- native grassland, and southern mixed chaparral. Eucalyptus woodland and disturbed habitat comprising unpaved roads and trails are also present.

2.0 METHODS

The study area comprises the proposed development footprint, including limits of brush management and potential Proctor Valley Road realignment areas, and totals approximately 778 acres (Figure 2). A QCB habitat assessment of the study area was conducted by HELIX biologist Jasmine Bakker on February 12, 2015. Based on this habitat assessment, approximately 216 acres were excluded from the survey area, largely as dense chamise chaparral or southern mixed chaparral. The 562-acre QCB survey area was divided into smaller areas and distributed amongst the surveyors to ensure 100 percent coverage of the survey area.

Seven weekly protocol surveys were conducted in accordance with the U.S. Fish and Wildlife Service (USFWS) Survey Protocol for Quino Checkerspot Butterfly (2014) by HELIX biologists Jasmine Bakker, Erica Harris, Stacy Nigro, and Sally Trnka, and consultants Busby Biological Services, Inc. and Rocks Biological (Appendix A). HELIX biologists Tara Baxter, Laura Moreton, and Ben Rosenbaum participated as supervised individuals. Surveys began on February 17, 2015 and continued through April 2, 2015. The first QCB in Riverside County was reported at Oak Mountain by Adam Malisch on February 26, 2015 (Quino Biologists United 2015). The first QCB in San Diego County was reported at Marron Valley by Alison Anderson on March 12, 2015; however, additional sightings of QCB within San Diego County were limited. The seventh and last survey was conducted the week of March 30; however, the seventh survey was not completed for the entire survey area because surveys were discontinued due to host and nectar resources conditions and limited QCB sightings in San Diego County (see additional details in Section 3.0).

Quino Checkerspot Butterfly Survey Report for Otay Ranch Proctor Valley Village & Preserve / JPD-08 / June 3, 2015 1 Surveys consisted of walking through appropriate habitat and identifying all butterflies observed by sight and with the aid of binoculars. Larval host plants were mapped with the aid of hand-held Global Positioning System (GPS) units (Figure 3), and potential nectar plant species were documented. Surveys covered between 5 and 10 acres per hour, with the exception of the first survey conducted on February 20 due to limited protocol weather conditions.

Identification of butterflies was based on personal knowledge, museum specimens, the San Diego Natural History Museum website, and field guides by Shiraiwa (2009) and Glassberg (2001). Other nomenclature for this report is taken from Holland (1986) and Oberbauer (2008) for vegetation communities and Baldwin et al. (2012) for plants.

3.0 RESULTS

No QCB or QCB larvae were detected within the survey area during the 2015 protocol surveys.

Surveyors observed a total of 3,849 butterfly individuals representing at least 32 butterfly species during the seven surveys. The most common butterflies observed were Behr’s metalmark (Apodemia mormo virgulti), funereal duskwing (Erynnis funeralis), southern blue (Glaucopsyche lygdamus australis), ladies (Vanessa spp.), and Sarah’s orangetip (Anthocharis sara sara).

Two larval host plant species were observed within the survey area: dwarf plantain (Plantago erecta) and purple owl’s clover (Castilleja exserta). Parish’s owl’s clover (Castilleja densiflora), a potential host plant species similar to purple owl’s clover, was more commonly observed in small patches throughout the survey area than purple owl’s clover. Dwarf plantain was mapped in patches of low density (1 - 100 plants), medium density (100 – 1,000 plants), and high density (1,000 – 10,000 plants); the owl’s clover were mapped in low density patches (Figure 3). High density patches of dwarf plantain were mapped as polygons if they were in areas larger than approximately 250 square feet, and a few of those were reported to have greater than 10,000 plants. Host plants were in good condition during the first 6 weeks of surveys and representative of a typical year; however, by the seventh week dwarf plantain numbers decreased and most individuals has senesced.

Seven potential nectar sources known to be utilized by QCB were noted within the survey area: popcorn flower (Cryptantha and Plagiobothrys spp.), California buckwheat (Eriogonum fasciculatum), goldfields (Lasthenia spp.), ground pink (Linanthus dianthiflorus), goldenstar (Muilla maritima), rancher’s fiddleneck (Amsinckia intermedia), and onion (Allium sp.). Other potential nectar sources were documented on survey forms and field notes. California buckwheat was a dominant within coastal sage scrub and was observed flowering throughout the seven surveys. Popcorn flower was present throughout the survey area and onion was common within patches of grassland intermixed with the chaparral communities on the north-facing slopes. Ground pink and goldfields occurred in smaller, isolated patches, and rancher’s fiddleneck occurred occasionally along the road and trails.

Dominant plant species within the coastal sage scrub were primarily California buckwheat, California sagebrush (Artemisia californica), San Diego sunflower (Bahiopsis laciniata), laurel sumac (Malosma laurina), and deerweed (Acmispon glaber). Dominant plant species within the

Quino Checkerspot Butterfly Survey Report for Otay Ranch Proctor Valley Village & Preserve / JPD-08 / June 3, 2015 2