Juan Manuel Borrero / Illustration of Audouin's Gull (Larus audouinii). Near Threatened species. Pencil and watercolor painting.

Juan Manuel Borrero / Illustration of seagulls. Caspian Gull (Larus cachinans), Audouinas Gull (Larus audouinii), Common Black-headed Gull (Chroicocephalus ridibundus). Pencil, watercolor and pastel illustration