Types
A variety of PDAs, or personal digital assistants, abound and can carry or support different birding software. Programs can include over a thousand different birds, allowing search options such as name, color, locale or size to narrow down the bird seen in the field.
Features
Software is available that allows you to record your observations and download them later as a functional computer file, reports eBird. You can even submit your information to participating ornithology laboratories for scientists to analyze.
Fun Fact
Some software has been developed to play bird songs so you can lure in a particular species for viewing. The songs can be categorized by bird name or its family type for easy accessibility.