The largest bird in North America, the California condor most often nests in natural cavities along cliffs, including caves. However, they may also nest in large trees, such as the coast redwood.

These elaborate constructions are just some of the birds' nests found at the Natural History Museum in Tring, UK, one of the ...

held in the Museum's bird egg collection The Museum holds one of the largest and most comprehensive collections of blown birds’ eggs in the world as well as over 4,000 nests. In total we hold over 200 ...