10,000 Birds

JUNE 15, 2011

But the sleekest of the sulids may be found in the family Sulidae. As is often the case in birds, teenagers, and other living creatures, these charismatic colors play a prominent role in the booby’s breeding rituals. This booby’s blue feet mirror the color of clear skies from pale aquamarine to deep turquoise.

Ecuador 179

Ecuador Peru Hunters Pelicans 179

10,000 Birds

DECEMBER 6, 2016

Each family group starts with a description of what traits are common to the species within the family, its representation in Northern Central America, and other interesting, relevant facts. Each species account lists the basics—common name, scientific name, measurements in inches and centimeters.

El Salvador 229

El Salvador America Costa Rica Honduras 229

10,000 Birds

APRIL 1, 2014

In Sibley Two, the in-flight images literally fly across the page in slight diagonals, with the full-bodied images are presented below in a parallel order (meaning we see the same bird–fresh juvenile, worn juvenile, 1st year, Adult breeding, Adult nonbreeding–in the same part of the page for each species).

North America 229

North America Birds Species America 229