Meet our grantees
Wild Animal Initiative funds academic research on high-priority questions in wild animal welfare.
The goal of our grants program is to fund research that deepens scientific knowledge of the welfare of wild animals in order to better understand how to improve the welfare of as many wild animals as possible, regardless of what causes the threats to their well-being.
We showcase our grantees and their projects here and continuously update this page as new projects are added.
Evaluating short- and long-term impacts of injury and illness on wild bird welfare
Grantee: Katie LaBarbera
Institution: San Francisco Bay Bird Observatory
Project summary
Surprisingly little is known about how illness and injury impact the welfare and survival of wild animals, as detecting and assessing injuries and tracking animals to determine their fates is challenging. Yet bird banding stations and wildlife rescues require this information to decide whether birds can be ethically released with long-term impairments. This project will use the San Francisco Bay Bird Observatory (SFBBO)’s long-term bird-banding dataset, which spans over 30 years and 100,000 captures, to investigate these questions in wild birds. Bird banding involves close examination of wild individuals who are frequently recaptured over time. With a high rate of recapture, the SFBBO tracks individuals over years, monitoring their injuries and health, and estimating survival.
Determining the practical and statistical methods necessary for employing field-based metrics of welfare on wild, juvenile, birds
Grantee: Daniel Hanley
Institution: George Mason University
Project summary
Because welfare can vary between individuals and throughout the life of an animal, methods for measuring, assessing, and comparing welfare have been a barrier to our understanding of juvenile welfare. Initial investigations of welfare metrics are needed to estimate age-specific welfare in wild juvenile animals, to determine how they deviate from population-level estimates, and to extend methods and metrics to other systems. This study will examine welfare in free-living prothonotary warblers to establish standardized field and analytical procedures necessary to obtain age-specific animal welfare estimates. Prothonotary warblers are an ideal model system for studying age-specific welfare because they have well-defined life stages, face unique environmental risks, have variable survival, and nest within cavities, affording a degree of standardization and control.
Thermal imaging to investigate physiological state in altricial nestlings
Grantee: Paul Jerem
Institution: Tufts University
Project summary
Animal stress responses evolved to increase survival, in part by stimulating behaviors that reduce exposure to challenging situations. However, young birds who are entirely reliant on their parents (“altricial”) are incapable of acting to change their circumstances, potentially exposing them to the damaging effects of chronic stress. Such species are known to suppress aspects of their stress physiology during development. However, it remains unclear if other parts of the system remain active and could serve as useful indicators for efforts to improve early life welfare. This project seeks to investigate this possibility in juvenile house sparrows (Passer domesticus) using a novel, non-invasive method for inferring internal state — thermal imaging of body surface temperatures.
It takes guts to grow in the city: the role of the gut microbiome in the welfare of juvenile urban birds
Grantee: Pablo Capilla-Lasheras
Institution: University of Glasgow
Project summary
Approximately 30 million blue tits hatch every year in UK cities, but around 63% die as juveniles. One reason for this may be that juvenile birds in urban habitats tend to have low-quality diets, causing stunted growth and increased early-life mortality. Research suggests that gut microbiome composition may contain indicators of an animal’s welfare, but this has received little attention in a wild animal context. This project will combine telomere attrition, begging behavior, and other health metrics with a study of juvenile birds’ gut microbiomes to investigate how to improve the welfare of juvenile blue tits in urban areas. It will also test the potential for gut microbiome enrichment to improve the life experience of juvenile birds in urban habitats.
The impact of road noise on the welfare of free-living juvenile white-footed mice
Grantee: Michael Sheriff
Institution: University of Massachusetts Dartmouth
Project summary
This project will examine how road noise impacts the ability of juvenile white-footed mice in Massachusetts to respond to the threat of predation. Preliminary work has shown that experimental manipulation of road noise disrupts the foraging responses of (adult) small mammals to predation risk, possibly by masking their ability to perceive predators’ auditory cues. Perception of predation threat will be experimentally manipulated by auditory playback of owl noises at sites near and far from the highway, paired with controls at the same distances from the highway without auditory playback. Anxiety-related behaviors will be recorded in juveniles in an open field trap, and their feces will be studied to assess physiological stress and nutritional status.
The impact of anthropogenic stressors on the affective state of juvenile Murray cod
Grantee: Rafael Freire
Institution: Charles Sturt University
Project summary
Many freshwater fish populations have severely declined as a result of human-caused changes in their environment. Population decline often results from an increased mortality rate experienced on the individual level, with likely implications for the welfare of individuals living through a period of population decline. This study will examine how differences in water quality and the presence of potential predators affect a behavioral indicator of welfare — judgment bias — in juvenile Murray cod (Maccullochella peelii). In the future, data about how juvenile fish respond to these factors could guide interventions for helping juvenile fish survive to adulthood in the wild.
To feed or not to feed wild birds
Grantee: Marion Chatelain
Institution: University of Innsbruck
Project summary
Despite providing otherwise limited resources, bird feeders may attract predators, facilitate the exchange of pathogens, and increase intraspecific conflict. This project will study two common bird species: great tits, who use feeders intensively, and black redstarts, who typically do not use feeders. By monitoring the use of nestboxes in gardens with or without feeders, the project aims to evaluate social stress and competition for nesting sites caused by bird feeding. Fecal samples from nestlings will also be analyzed to understand impacts on stress physiology, growth rate, and ectoparasite load.
Density-dependent welfare in wild bird social networks: Linking resource distributions with disease dynamics
Grantee: Joshua Firth
Institution: University of Oxford
Project summary
This project will investigate how various potential density-dependent drivers of welfare interact and influence net welfare in two species of tit. Population density is expected to be directly related to infectious disease transfer and increased competition, but also to covary with processes that are potentially beneficial to welfare. The study will use historical data to determine how the relationship between population density and individual welfare is shaped by infectious disease, body condition, and mortality risk. The investigators will then manipulate density experimentally to test model outputs and determine potential causal links.
Improving the welfare of farmland invertebrates
Grantee: Dr. Ruth Feber
Institution: University of Oxford
Project summary
In Lepidoptera (butterflies and moths), larvae are much more abundant and less mobile than adults. Larvae are therefore particularly vulnerable to negative stimuli, including starvation and disease. This project will use lepidopteran larvae as a model for auditing the welfare impact of agricultural activities on invertebrates. Juvenile stages of Lepidoptera are exposed to agricultural practices that have the potential to affect their welfare. To quantify these impacts, the study will extend the Quality Adjusted Life Year (QALY) methodology to take into account the number of individuals affected by a specified action.
Drivers of welfare in American pikas (Ochotona princeps)
Grantee: Johanna Varner
Institution: Colorado Mesa University
Project summary
Pikas (Ochotona princeps) in alpine habitats have recently faced population losses and range retractions. Declines are most prominent in isolated mountain ranges with limited high-elevation habitat, like the La Sals, where pikas are consequently likely to experience lower welfare. This project will assess the welfare of pikas in the La Sals through patterns of survival, population demographics, physiological stress, body condition, ectoparasite load, and hydration. The researchers will also test hypotheses correlating these indicators to habitat quality, and investigate resource competition between pikas and mountain goats.