![]() ![]() The MWS is perhaps most important for monitoring species that breed in arctic areas not covered by the Waterfowl Breeding Population and Habitat Survey. ![]() The Mid-winter Survey (MWS) was first conducted in 1935 and is the oldest large-scale population survey of migratory birds that is conducted in North America. More information regarding the May survey can be found by visiting the USFWS website.įurther information and results of the May Survey can be found in the Waterfowl Population Status Report. These data allow the calculation of an annual index to the number of ducks for each species in the breeding population and are ultimately used by manager in the Central Flyway to monitor populations and determine hunting seasons. The number of "ponds" or wetlands with water.The number of pairs, single ducks, and ducks in flocks for each species.Each bird or pond observation is recorded directly into a computer file via a microphone and the corresponding location from the GPS is automatically recordedĭata collected along each established flight path or transect consists of:.Flight altitude is generally between 100-150 feet and speeds are held between 90-105 mph. ![]()
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