These unusual birds nests demonstrate how birds can adapt to their environment. Most species are searching safe places to make their nests, protecting somehow their eggs and thus the hatching of chicks. Usually choose tree trunks and roofs to let their babies, while with the passage of time and deforestation natural positions decreased dramatically. So techites nests deemed necessary as mu solution to this problem but also as facilitation of birds. View So then unlikely places chosen by the birds to make their eggs.