If palms are unavailable, they adopt other trees, or even man-made structures.
When the female produces an egg, she carefully lowers it into the nest platform and glues it in place with saliva.
Calling birds 'nature's most fastidious architects,' Ms Beals wanted to share her fascination with structures created 'in all shapes and sizes using a variety of materials.'There are those that build with mud, burrow tunnels, weave hanging pendulous baskets or cups onto branches, stitch leaves, stack sticks, or glue with saliva.
Some just make simple scrapes on the ground, or fill cavities with fur and bones, and others that camouflage their nests with lichen, spiderweb, or moss,' Beals wrote in her book.
It can take the female a month to weave a pendulous nest, which is entered from the top, with a nesting chamber at the bottom.
Brown Boobies breed on the islands and atolls of the Pacific, Atlantic, and Indian Oceans, and the Caribbean Sea.
especially insect-rich land bordering water, filled with cottonwood, sycamore, and willow trees. Usually the female weaves the hanging nest, but her mate may help, the pair working in tandem, one on the inside, the other out.The only North American member of the penduline-tit family (Remizidae), these tiny insectivores survive bitter winters and searing summers in the arid forests, scrub lands, and deserts of the American Southwest and Mexico They manage this year-round residency by building small thorny domes for both breeding and roosting.Fledglings as young as three months construct their own nests, and in a year a Verdin may build a dozen solo shelters.Nest collecting was made illegal in the Migratory Bird Treaty Act, signed into law in 1918.
Several of the photos are also on display now through May 2014 at the National Academy of Sciences, in Washington, D. All captions and further descriptions are courtesy of Ms Beals.
Like all hummingbirds, nest building and care of the young is the responsibility of the female.