Wild birds are monitored with the important objectives of identifying their habitats and
estimating the size of their populations. Especially in the case of migratory bird, they are …

Efficient and effective monitoring methods are required to assess population status and
gauge efficacy of conservation actions for threatened species. Here we review the spectrum …

Selecting a survey design to detect change through time in an ecological resource requires
balancing the speed with which a given level of change can be detected against the cost of …

Wildlife population estimators often require formal adjustment for imperfect detection of
individuals during surveys. Conventional distance sampling (CDS) and its extensions (mark …

Management of large mammal populations has often been based on aerial minimum count
surveys that are uncorrected for incomplete detection and lack estimates of precision. These …

Assessing grizzly bears'(Ursus arctos) abundance in the Arctic has been challenging
because of the large scale of their movements and the remoteness of field locations. We …

Monitoring programs are typically designed to identify long‐term trends in animal
abundance, however estimating abundance at a relevant scale can be logistically …

Aerial surveys are an efficient technique for counting animals over large geographic areas
such as rangelands. In southwestern rangelands, aerial surveys are routinely conducted for …

Recent work has demonstrated that aerial distance sampling surveys are more efficient and
effective than unadjusted minimum count surveys for estimating Dall's sheep (Ovis dalli) …

Effective wildlife monitoring and management are reliant on unbiased estimators of
population parameters. Most standard survey approaches ignore spatial pattern in the data …