Sibley Birds East 20459 Solid Swivel Connector with Patented

Solid Swivel Connector with Patented 5-hole Length Adjustment

Large Pit Zips for Easy Venting

Waterproof synthetic rubber boot with adjustable nylon collar

Micro adjustable pins using the revolve micro pin system

Handle Material: 6061-T6 Aluminum

Sibley Birds East 20459 Solid Swivel Connector with PatentedThe Sibley Field Guide to Birds of Eastern North America is for all birders seeking an authoritative guide to the birds of the east in a portable format that is easy to carry into the field. Compact and comprehensive, this guide features 650 bird species, plus regional populations, found east of the Rocky Mountains. Entries include stunningly accurate illustrationsmore than 4,601 in totalwith descriptive captions pointing out the most important field