Estimating Flock Size

Introduction to Animal Unit (AU) Concepts for Production of Sheep and Goats

A Birder's Online Toolbox — BBA

Bird Counting 201 - eBird

PDF) Estimating shorebird numbers at migration stopover sites

Mean flock size as a function of the total population of redshanks

Recent research shows importance of SC islands in migration of threatened red knots

How to Count Birds : Help Center

Counting Shorebirds: Tools, Tips, And Tricks

Long-range UAVs for anti-poaching solutions and wildlife application.

how many birds our in a starling flock

Survey Techniques and Protocols