A Los Angeles Foshay Learning Center student looks through a refractometer to check water salinity during the Amigos de Bolsa Chica-led field trip at the Bolsa Chica Ecological Reserve, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds, like this rare BeldingÕs Savannah sparrow. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds, like this Elegant tern. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds, like this Forster’s tern. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds, like this Great-blue heron. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds, like this rare Ridgeway Rail. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like sea slugs, stingrays, fish and birds. (Raul Roa / Staff Photographer)
Amigos de Bolsa Chica naturalist Kim DiPasquale led a field trip at the Bolsa Chica Ecological Reserve for Los Angeles Foshay Learning Center students, in Huntington Beach on Thursday, May 30, 2019. The children had a chance to look through a refractometer to check the salinity of the water and to check the water temperature along with watching oceanic wildlife like stingrays, sea slugs, fish and birds. (Raul Roa / Staff Photographer)