Fork-tailed drongo (Dicrurus adsimilis), Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Fork-tailed drongo (Dicrurus adsimilis), Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Swallow-tailed bee-eater (Merops hirundineus), juvenile with a butterfly, Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Swallow-tailed bee-eater (Merops hirundineus), Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Male great frigate bird (Fregata minor) displaying with bright red gular pouch on nesting and breeding site on North Seymour Island in the Galapagos Island Group, Ecuador. Pacific Ocean.

Juvenile great frigate bird (Fregata minor) nesting and breeding site on North Seymour Island in the Galapagos Island Group, Ecuador. Pacific Ocean.

Male great frigate bird (Fregata minor) showing expanded gular pouch near nesting and breeding site on North Seymour Island in the Galapagos Island Group, Ecuador, Pacific Ocean.

Male great frigate bird (Fregata minor) in flight showing expanded gular pouch near nesting and breeding site on North Seymour Island in the Galapagos Island Group, Ecuador. Pacific Ocean.