Bird Rock (Marin County, California)

{{Short description|A rock formation in Marin County, California}}

{{Infobox islands

|name = Bird Rock

|local_name =

|image_name = BirdRock3339.jpg

|image_caption= Bird Rock {{As of|2009|lc=y}}

|pushpin_map = USA California#USA

|pushpin_relief = 1

|pushpin_map_caption =

|nickname =

|location =

|coordinates = {{Coord|38|13|48|N|122|59|40|W|type:isle_region:US-CA|display=inline,title|notes={{cite gnis|219317|Bird Rock|February 21, 2024}}}}

|total_islands= 1

|area_km2 =

|length_km =

|width_km =

|highest_mount=

|elevation_m =

|population =

|population_as_of =

|density_km2 =

|ethnic_groups=

|country = United States

| country_admin_divisions_title = State

| country_admin_divisions = California

| country_admin_divisions_title_1 = County

| country_admin_divisions_1 = Marin County, California

}}

Bird Rock is a rock formation and a small Pacific island west of Tomales Point in Marin County, California that is roughly {{convert|2|acre|ha|1}}.

A seabird colony, the island is covered with a layer of guano. Cormorants are common on the island,{{cite web|url=http://www.bahiker.com/northbayhikes/tomalespt.html|accessdate=2009-04-25|title=Tomales Point Trailhead}} and ashy petrels were found breeding there in 1972.{{cite journal|url=http://sora.unm.edu/node/121889|journal=Western Birds|volume=3|issue=3|page=71|author=David G. Ainley, Timothy Osborne |title=A Marin County, California, Breeding Site for Ashy Petrels}}