Bird Watching For Beginners
The Birding Manual
The Birding Manual provides just that with over 700 pages of in-depth descriptions of every North American bird. The Birding Manual takes you from being the casual backyard birdwatcher to becoming an avid birdwatcher. It won't be long and you will be planning trips to bird sanctuaries and other parts of the country, so you and your family can hone your birdwatching skills and The Birding Manual will be one of the first things you will want to take with you.
Robinson, editor of 'Sky and Telescope'. Robinson's career as an observer began with a series of planetary drawings and observations of the rapidly changing variable stars in the Orion Nebula. He worked at the Griffith Planetarium in Los Angeles before joining the staff of the magazine in 1962 as an editorial assistant, and he succeeded the late Joseph Ashbrook see planet (2157) as editor in 1980. Robinson has been an active promoter of professional-amateur cooperation in astronomy, and retains interests in solar-eclipse viewing and bird-watching. (M 16246)
If you choose Porro prism binoculars, you may also have a choice between center-focus and independent eyepiece focus. There are no advantages to center focus if the binoculars are to be used exclusively for astronomy, but if you intend to use them for terrestrial purposes (e.g., bird watching or horse racing) then you should get center focus. My preference for astronomy is independent focusing eyepieces. They tend to be more mechanically robust, do not suffer from a rocking bridge, and modern ones tend to be waterproof and nitrogen filled, reducing the likelihood of internal fogging.