For species 5-year reviews, you will most likely be drawing on different types of material such as published research, conference proceedings, dissertations, data sets, and published government documents: bulletins, reports, reviews, newsletters. You also might draw on sources from unpublished works such as internal government reports, or even correspondence. The bulk of this type of material falls under Grey Literature.
Due to the very nature of grey literature, it can be one of the most challenging to search and find what you're looking for but it is literally everywhere! Luckily, a large portion of documents by government organizations can be easily found using Google Scholar. You can also take advantage of Google's source search which also works well for finding freely available data sets!
Google Scholar will bring back scholarly and grey literature in your searches such as government or university technical reports, bulletins, and sometimes newsletters. You can adjust the year of publication to bring forward only those that are current or within the timeframe you wish to explore.
Using Google.com to your advantage
Searching basic Google but adding the command site: will allow you to specify the source of your results
For example, I might want a fact sheet on the endangered leatherback sea turtle in Georgia. I could search in Google "leatherback sea turtle georgia site:.gov" and expect to find listings from Fish and Wildlife, NOAA or even National Parks System.
These will often have individual state information for the topic you're looking for and usually are searchable within the website itself. Federal Agency Websites that may be helpful for your review writing:
U.S. Army Corps of Engineers : https://www.usace.army.mil/
U.S. Fish and Wildlife Services : https://www.fws.gov/
U.S. Geological Services : https://www.usgs.gov/
National Oceanic and Atmospheric Administration : https://www.noaa.gov/
Specific Websites to help with Species Five-Year Reviews:
**U.S. Fish and Wildlife Endangered Species - select state and search for whole listing, or select state and search for specific species. Has a wealth of information related to endangered species and 5-year reviews.
**U.S. Fish and Wildlife ECOS: Environmental Conservation Online System - Good for finding published or white-papers specific to FWS
**U.S. Fish and Wildlife Service ServCat: Service Catalog - This contains FWS National Datasets, land status maps, refuge comprehensive conservation plans, geospatial datasets, refuge annual narrative reports, refuge hydrogeomorphis analysis reports, sea-level affecting marshes model reports, management plans, wilderness character monitoring reports and environmental contaminants reports.
USGS Patuxent Wildlife Research Center Breeding Bird Survey - "This website presents population change information for more than 400 species of North American birds, as estimated from the North American Breeding Bird Survey. Estimates of trend (interval-specific estimates of population change), annual indices of abundance, and maps of abundance and population change for these species are presented for a variety of regions." currently reporting 1966-2017.
Below is a listing of library databases that can be helpful in finding published journal articles, and can also provide access to some grey literature such as conference proceedings, government bulletins, and legal cases. Some are more general in scope while others are more focused by discipline.
Below is a listing of various freely available databases of information pertaining to various types of organisms. These usually consist of information pertaining to taxa, species descriptions, geographic distribution, and habitats.
You might find some of the following journals helpful for finding research studies. These two have a broad scope within Wildlife Management and Ecology: