Animals having no backbone or spinal column, such as insects, mollusks, crustaceans, worms, and similar organisms.
USGS Zebra Mussel Monitoring Program for north Texas [ More info] General characteristics of this invasive freshwater mollusk, focusing on how we monitor its presence and migration through this region.
West Nile Virus (WNV) [ More info] National Wildlife Health Center studies the West Nile Virus to learn the current geographic extent, to understand how the virus moves between birds, mosquitoes, and humans, and to predict future movements of the virus.
Whales and walrus: tillers of the seafloor [ More info] Report on sea floor marks in the Northeast Bering Sea and Chukchi Sea that were identified as pits and furrows caused by whales and walruses in the process of feeding on bottom crustaceans.
Alphabetical Index of Topics
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