Filtering by
- All Subjects: Bird populations
- All Subjects: Aquatic animals
- Creators: Pima County (Ariz.). County Administrator's Office
![42695-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42695-Thumbnail%20Image.jpg?VersionId=EelXcSbcqblJGuw5BLDl983MiENxIH27)
Most of the owls until just the last couple of years have been found in residential areas in northwest Tucson. It take a lot of cooperation on the parts of private residents to help get the work done. These are incredible little birds that fill an interesting role in the environment since they are more diurnal versus nocturnal. Our objective is to gather as much information as fast as possible to feed into the process to make this County plan based on the best available science that we have.
![42696-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42696-Thumbnail%20Image.jpg?VersionId=Y2RQRXjRuceHqLB.S6TOKtjJ8NtNLVcr)
The historical range of the ferruginous pygmy-owl included areas of southern Arizona, southern Texas extending south along both coasts in Mexico, through Central America into the southernmost population in Argentina. However, over the past 150 years urban and agricultural expansion within the United States has reduced its population to a few isolated pockets of uncertain stability.
![42697-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42697-Thumbnail%20Image.jpg?VersionId=A9xOzrH1MujkdJsHufO1ZWUAujMFxFAi)
The Arizona population of the cactus ferruginous pygmy-owl was listed as an endangered species under the Endangered Species Act in 1997. Historical records and recent surveys definitely show a decline of species. There is a wealth of historical information out there and it still trickles in every day.
![42734-Thumbnail Image.png](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-07-06/42734-Thumbnail%20Image.png?VersionId=39fofkJa77XfU3pqnroTLBXZ7BIOqpNT)
This study by DR. Philip Rosen stands as one of the most impressive, given the scope of the author's knowledge, and it is one of the most ingenious, given the proposed concepts for restoration and protection of native fish and frogs within the urban Tucson Basin.
![42662-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42662-Thumbnail%20Image.jpg?VersionId=X0lmHBM8OM1F9rpIFylQMl3Q7sXIxlOP)
Pima County contracted with Arizona Game and Fish Department to conduct telemetry analysis and gather information that would lead to effective conservation and recovery initiatives for the cactus ferruginous pygmy-owl. During 1997, banded birds were monitored. Beginning in 1998 and during 1999, pygmy-owls were radio-marked with backpack transmitters and followed on foot or by vehicle.
![42628-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42628-Thumbnail%20Image.jpg?VersionId=xLl1MEW9.w4YdqxWdvrTAXEONdQTc3nm)
Report is a review and compilation of existing data on water quality requirements of eight aquatic species. By identifying the water quality requirements of priority vulnerable species of concern, and assessing the quality of water that serves or might serve as potential habitat, we begin to understand which sources will support priority aquatic species identified by the SDCP.
![42638-Thumbnail Image.jpg](https://d1rbsgppyrdqq4.cloudfront.net/prism/s3fs-public/2021-04-28/42638-Thumbnail%20Image.jpg?VersionId=.pL.yOu0Rmp8NYdvnlYU3D8AoVxcoWLX)
Exotic species and their effect on Pima County's aquatic environments have become a priority issue for those involved with managing aquatic ecosystems in eastern Pima County. Invasion of exotic aquatic species presents a major challenge when preserving and restoring native aquatic species in the region.