Home Archived October 29, 2018

South Florida Information Access (SOFIA)

projects > demographic, movement, and habitat of the endangered snail kite

Demographic, Movement, and Habitat of the Endangered Snail Kite

photo of sun shining through clouds
Project Investigator: H. Franklin Percival

Project Start Date: 2005 End Date: 2007


This study integrates demographic and movement studies of the endangered snail kite with monitoring studies which document the response of snail kite habitats within Water Conservation Area 3A to the initiation and implementation of Interim Operation Plan Alternative 7R.

During the first half of this century, snail kite populations dramatically declined. Most researchers suggest declines in kite populations are correlated with changes in hydrology directly or indirectly. These include loss of habitat, effects on apple snail populations, effects on reproduction, changes in foraging and nesting habitat structure, and effects on adult and juvenile survival of snail kites.

Previous population viability model studies have determined that adult survival is the most sensitive demographic parameter in determining population viability of this endangered species and there is a general need for better estimates of these and other demographic parameters. For the past several years, the Florida Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey (USGS) has conducted a monitoring effort to examine reproduction, survival, and movement patterns of snail kites throughout central and southern Florida to determine patterns of reproduction success, estimate survival of adult and juvenile snail kites, and determine the effects of environment on these parameters as well as movement probabilities.

Scope of Work


Leaflet Map showing project area. This map requires enabled JavaScript to view; if you cannot fully access the information on this page, please contact Heather Henkel.

References to non-U.S. Department of the Interior (DOI) products do not constitute an endorsement by the DOI.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
This page is: https://sofia.usgs.gov/projects/index.php
Comments and suggestions? Contact: Heather Henkel - Webmaster
Script last updated: 23 October 2018 @ 12:03 PM by THF. Record creator: BJM. Record last updated by: BJM.