She was awarded her PhD in 2013 from the University of New South Wales for her work using stable isotopes and biomechanics to reconstruct the diet of the extinct Tasmanian tiger (Thylacinus cynocephalus) and its close relatives. Stable isotope analysis of vibrissae was also used as a tool for temporal monitoring of wild Tasmanian devils (Sarcophilus harrisi).
Her earlier research used 3D Finite Element Analysis of biological structures to assess prey size limits and foraging behaviour of extinct birds and mammals. The shape and mechanical performance of the Haast's eagles skull and talons suggest it hunted like an eagle, but fed like a vulture. Her research on skull biomechanics of extinct marsupials advanced understanding of the Tasmanian tiger's hunting behaviour, suggesting its jaw mechanics and bite force restricted it to smaller prey, thereby challenging traditional views.
Her research also explores avian eggshell evolution, with attention to eggshell conductance, shell thickness, egg shape and mimicry, membrane structure, and surface texture.
Attard leads the "Albatrosses from Space" Darwin Plus project (DPLUS132) at the British Antarctic Survey, launched in 2022 on the GeoHive platform. This citizen science project initiative uses Very High Resolution (VHR) satellite imagery to monitor wandering albatross (Diomedea exulans) colonies across South Georgia. The project aims to establish population baselines, detect distribution changes, and inform conservation policies on threats such as bycatch.
In 2022, she was awarded a Darwin Plus grant (DPLUS187) to develop satellite-based monitoring of South Georgia seabird populations, including albatrosses, mollymawks, shags, and burrowing petrels.
12Attard, M. R. G.; Chamoli, U.; Ferrara, T. L.; Rogers, T. L.; Wroe, S. (2011). "Skull mechanics and implications for feeding behaviour in a large marsupial carnivore guild: The thylacine, Tasmanian devil and spotted-tailed quoll". Journal of Zoology. 285 (4): 292. doi:10.1111/j.1469-7998.2011.00844.x.
↑Birkhead, Tim; Russell, Douglas; Garbout, Amin; Attard, Marie; Thompson, Jamie; Jackson, Duncan (October 2020). "New insights from old eggs – the shape and thickness of Great Auk Pinguinus impennis eggs". Ibis. 162 (4): 1345–1354. doi:10.1111/ibi.12820. hdl:10141/622680.
↑Attard, M. R. G.; Medina, I.; Langmore, N. E.; Sherratt, E. (November 2017). "Egg shape mimicry in parasitic cuckoos". Journal of Evolutionary Biology. 30 (11): 2079–2084. doi:10.1111/jeb.13176. PMID28898493.
↑Birkhead, Tim R.; Attard, M.; Pilastro, A. (April 2019). "Subtle Egg-Shell Membrane Structures in Birds' Eggs". Molecular Reproduction and Development. 86 (4): 353. doi:10.1002/mrd.23103.