Little Blue Heron (Egretta Caerulea), Tortuguero National Park, Limon Province, Costa Rica, Central America

Immature little blue heron (Egretta caerulea), Everglades National Park, Florida, United States of America, North America

Little Blue Heron, Egretta caerulea, wading bird standing on one foot on a pole at Captiva Island, Florida, USA

Little Blue Heron, Egretta caerulea, on tree branch in the Florida Everglades, United States of America

Common Green Tree Frog (Litoria caerulea), rainforest, Iron Range National Park, Cape York Peninsula, northern Queensland, Australia

Common Green Tree Frog (Litoria caerulea), rainforest, Iron Range National Park, Cape York Peninsula, northern Queensland, Australia

Flower, Blue Lotus (Nymphaea caerulea), Botanical Garden Berlin, Berlin, Germany, Europe

Flower, Blue Lotus (Nymphaea caerulea), Botanical Garden Berlin, Berlin, Germany, Europe

Blue Tit (Parus caerulea), Emsland, Lower Saxony, Germany, Europe

Blue Grosbeak (Guiraca caerulea), female on huisache tree, Starr County, Rio Grande Valley, South Texas, USA

passion flower, detail of blossom (Passiflora caerulea)

Little blue heron (Egretta caerulea), Africa

passion flower blooming

Couple of Imperial Shrimp (Periclimenes imperator) on a blue sea cucumber (Actinopyga caerulea) 76 meters deep, Mayotte

Imperial Shrimp (Periclimenes imperator) on a blue sea cucumber (Actinopyga caerulea) 76 meters deep, Mayotte

Catananche caerulea 'Major'

Catananche caerulea 'Major'