Laycock, G.Audubon Magazine2010-02-152010-02-151974http://hdl.handle.net/1969.3/18907p. 2-17.Both mainland subspecies of the brown pelican were put on the endangered species list in 1970. The outlook was gloomiest along the Louisiana coastline, and the story was scarcely better in Texas. Then from the Pacific coast, pelican colonies were reported to be experiencing disastrous population crashes. Evidence linking the brown pelican's widespread troubles to insecticides mounted. Today, the brown pelican seems to be bouncing back in Louisiana and California, while reports elsewhere are still mixed.aquatic birdsbrown pelicanendangered speciesinsecticidespesticidesenvironmental effectsagricultural pollutionPelecanus occidentalisArticle