Like human fingernails, birds’ beaks grow continually throughout their lives and are worn down by eating and other habits. In black-capped chickadees and other birds affected by the deformity ...

A bird beak deformity first recorded among black-capped chickadees near Anchorage has been increasingly seen in crows in Southeast Alaska, broadening a mysterious phenomenon.

Researchers now believe a virus may be causing the beak deformities. Listen Now Homer resident Michael Craig first noticed a deformed bird at his feeder about six years ago.

ANCHORAGE — Biologist Colleen Handel saw her first black-capped chickadee with the heartrending disorder in 1998.The tiny birds showed up at birdfeeders ...

Bird beaks have inner layers of bone covered by an outer layer of keratin, the same stuff as fingernails. The disorder affects the outer layer, stimulating the keratin to grow twice as fast as norm… ...

Tweaked Beaks: How Bird Deformities Help Flag Undetected Toxins. 1 minute read. By TIME Staff. November 8, 2010 11:42 PM EST. Terry Cryer—CORBIS Pete Seeger, c. 1960s.

It's been nearly 15 years since people started noticing a lot of Black-capped Chickadees in Southcentral Alaska suffering from overgrown beaks, a deformity that interferes with a bird's ability to ...

Already the deformities seem to be spreading: Bird watchers in the Pacific Northwest, Great Britain, India, and South America have been reporting growing numbers of birds with deformed beaks ...

As for the deformities, Clark said: "There are two main reasons: One is avian pox, which can hit hummingbird[s] pretty hard ...

Yet, scissor beak is among the most obvious because it’s a clear deformity of a bird’s upper and bottom beaks. It’s not common, and it frequently affects poultry—though it can affect pet ...

ANCHORAGE, Alaska – Biologist Colleen Handel saw her first black-capped chickadee with the heartrending disorder in 1998. The tiny birds showed up at birdfeeders in Alaska’s largest cit… ...

In Britain, significant numbers of blue tits, a close relative of black-capped chickadees, have been observed with beak deformities. In all, 36 species with deformed beaks have been documented there.