Dog detection outperformed humans in avian carcass surveys

What the study found: A conservation detection dog found avian carcasses more often than human surveyors. Detection by both humans and the dog was influenced by carcass size and ground substrate, with larger carcasses and lower vegetative complexity linked to higher detection.
Why the authors say this matters: The authors say the findings can help managers design carcass surveys and improve wildlife mortality monitoring. They conclude that more accurate mortality estimates can better inform management and conservation efforts.
What the researchers tested: The researchers ran two years of detection trials in the semi-arid high desert of southern New Mexico, USA. They tested 27 human surveyors and one conservation detection dog across 1,096 trials using 238 carcasses from 50 avian species.
What worked and what didn't: The dog had a mean detection probability of 0.87, compared with 0.49 for human surveyors overall; individual human surveyors ranged from 0.25 to 0.71. Detection probabilities were higher for larger carcasses and in areas with lower vegetative complexity.
What to keep in mind: The abstract does not describe detailed limitations beyond the study setting and the fact that only one dog was tested. The results are specific to the trials described in the southern New Mexico high-desert environment.

Key points

• A conservation detection dog detected avian carcasses more often than human surveyors.
• The dog’s mean detection probability was 0.87, versus 0.49 for human surveyors.
• Detection was higher for larger carcasses and in areas with lower vegetative complexity.
• The study used 1,096 trials, 238 carcasses, and 50 avian species.
• The authors say the findings may help improve carcass survey design and mortality estimates.