Clubbing is an enlargement of the ends of the fingers and a downward sloping of the nails. Although it's not caused by chronic obstructive pulmonary disease (COPD), it can be a sign of coexisting lung cancer or other lung disorders in patients with COPD. Clubbing is sometimes called digital clubbing. It can affect the fingers and/or toes.
Relatives. Darwin's finches can be divided into groups based on beak type. There are three species of tree finch: the small tree finch, medium tree finch, and large tree finch. Tree finches have grasping beaks.
Product Overview. Nyjer Seed is the absolute favorite of Finches, such as the American Goldfinch, House Finch, Purple Finch, Pine Siskin and other small Songbirds. This tiny delicacy is used in Finch Feeders which have smaller holes and tiny perches-perfect for the Finches but discouraging to larger birds.