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How nests found Arizona 2011-2013

Dates

Publication Date
Start Date
2011-07-26
End Date
2014-07-23

Citation

Ruth, J.M., 2017, Life history attributes data for Arizona Grasshopper Sparrow (Ammodramus savannarum ammolegus) in Arizona 2013: U.S. Geological Survey data release, https://doi.org/10.5066/F7C53JCF.

Summary

In 2011 through 2013, when nests were found, notes were kept on whether it held eggs or hatchlings at the time of discovery, and how it was found. Ammodramus savannarum ammolegus (commonly referred to as the Arizona Grasshopper Sparrow) occurs in the desert and plains grasslands of southeastern Arizona, southwestern New Mexico, and northern Sonora, Mexico. Although a subspecies of conservation concern, this data was produced as part of the first intensive study of its life history and breeding ecology, providing baseline data and facilitating comparisons with other North American Grasshopper Sparrow subspecies. This study is described in the publication listed in the larger work citation of this metadata record.

Contacts

Point of Contact :
Janet M Ruth
Originator :
Janet M Ruth
Metadata Contact :
Colin Talbert
Distributor :
GS ScienceBase

Attached Files

Click on title to download individual files attached to this item.

ARCHIVE How AZ GRSP Nest Found.csv 5.38 KB text/csv

Purpose

The primary objective of this study was to provide baseline data that would address the information gap for this subspecies of conservation concern. Specifically, I estimated basic life history attributes of ammolegus including male mass and morphometric measurements, territory size, and return rates, as well as nest placement and orientation, nest and egg dimensions, clutch size, and nest parasitism rates. The secondary objective of this study was to compare ammolegus morphometric and mass estimates with available data for other Grasshopper Sparrow subspecies.

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