Young birds fall into two categories.
Pretty (greylag goslings)
Ugly (young herring gulls)
Off-theme, but worth posting anyway is a peregrine that I saw flying overhead as I was leaving work this evening. There was also a buzzard in the vicinity. The local gulls were not happy!
Camera note: all shots taken with the Canon 7D and EF 100-400mm f/4.5-5.6L USM IS lens.