Wildlife Acoustics Blog

Changes to the Wildlife Acoustics Product Lineup in 2016

Changes to the Wildlife Acoustics Product Lineup in 2016

At Wildlife Acoustics, our mission is to continually develop new and better products – while delivering support and service for the products you’ve purchased from us over the years. Toward that mission, this blog post provides an update on the future availability of products you may own.

SM2+ and SM2BAT+ recorders and accessories will continue to be sold through 2016 and then will not be available. If you anticipate needing SM2+ or SM2BAT+ recorders in 2016, please contact us for availability as these will only be built as demand warrants. We will continue to honor warranties, and service these products for years to come. Please consider the SM4 or the SM4BAT as superior alternatives.

If you need to create time-synchronized recordings for localization and/or produce a schedule that does very different things on different days, the SM3 is the recorder of choice. And if you need to capture any combination of birds or other wildlife on a second channel, SM3BAT is the way to go.

Explaining Maximum Likelihood Estimators (MLE) and P-values used in Kaleidoscope

The U.S. Fish & Wildlife Service Indiana Bat Summer Survey Guidance describes the use of approved software programs. As part of their software testing criteria:

As species identifications are never perfect, all analysis programs must utilize a maximum-likelihood estimator approach to determine species presence at the site rather than relying on a single sequence. Post-hoc maximum-likelihood estimator p-values will be used to determine acceptance thresholds for final identification determination. The maximum-likelihood estimator used by Kaleidoscope Pro is based on a 2002 paper by Britzke, Murray, Heywood, and Robbins "Acoustic Identification".

The method described takes two inputs. First, there are the classification results e.g. How many detections of each bat did the classifier find? Second, there is the confusion matrix representing the known error rates across all the classifiers. For example, 70% of MYLU calls are correctly classified as MYLU while 3% of MYLU calls are misclassified as MYSO, etc. The maximum likelihood estimator determines what the most likely distribution of different species are that would result in the observed classifications given the classifier error rate. Then, to calculate P-values, a given species is clamped as absent and the most likely distribution is recalculated. The ratio of the clamped likelihood divided by the original likelihood is the P-value.

Reminders for the Nov 15th Grant Deadline

With our second Scientific Product Grant deadline fast approaching, we’d like to remind applicants of some important guidelines to ensure that your application goes as far through the process as possible.

If you are applying by the Nov 15th, 2015 deadline, please keep in mind:

  • You will need to complete an updated application form, found here. The previous form used in the last application cycle is no longer valid.
  • The SM4 and SM4BAT are not available in this grant cycle as the grant will be awarded by the end of December.
  • Please ensure that you have included the documentation requested and have read the instructions carefully.

After determining if the applications fit our requirements and have provided the requested information, we will look for the best projects that make significant use of bioacoustics, advance scientific knowledge, and contribute to long-term conservation.

Wildlife Acoustics is proud to support wildlife conservation efforts

Merlin Tuttle's Bat Conservation Bat Conservation International Bat Conservation Trust Wildlife Habitat Counsil