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BiologyBullfinches have a broad diet, consisting mainly of the seeds and berries of a variety of plants. When these are scarce during the spring they turn to the buds of fruit trees. When bullfinches occurred in higher numbers they were considered to be pests of orchards. Nests are built in dense hedges and woods between four and seven feet from the ground. Fine twigs, moss and lichens are used to construct the main body of the nest and a lining of fine roots is added. In May 4-5 pale blue spotted eggs are laid, the female incubates the eggs for 12-14 days after which both parents feed the chicks. A further 12 to 16 days later the chicks fledge. A second brood is then usually produced (3).