How much is a Second Class stamp? <a href=" http://www.bumbutabur.net/what-is-atarax-25-mg-used-for.pdf ">hydroxyzine hcl 25 mg for anxiety</a> Alex Kacelnik, a professor of zoology at Oxford University and author of the study, said that the birds themselves were very playful and inquisitive. "They're particularly keen on exploring new things," he told ABC News.