Bobwhites in Grasslands Working Lands For Wildlife 2.0 Presented - - PowerPoint PPT Presentation

Bobwhites in Grasslands

Working Lands For Wildlife 2.0

Presented by: Jef Hodges, Grassland Coordinator National Bobwhite Conservation Initiative

The States Have United for Bobwhites

25 States + Partners 1 Unified Technical Committee 1 Unified Initiative

Southeast Midwest Northeast Many Partners

WLFW 2.0 Priority Landscapes

The “Working Lands” Objectives

1) Replace a portion of exotic forages, especially endophyte infected tall fescue, with native grasses and forbs; 2) Develop prescribed grazing plans that meet bobwhite habitat needs while applying appropriate utilization of native forage; and 3) S upport prescribed grazing and enhance bobwhite habitat through the use of supplemental practices.

Modified Knopf diagram relating grazing intensity, plant structure and bobwhite habitat niches.

Plant Community Bobwhite Habitat Mostly invaders, some increasers Mostly increasers, some invaders Mostly increasers, some decreasers Mostly decreasers, some increasers Poor Fair Good Excellent Poor nesting, excellent food, S

• me nesting,

good food Good nesting, some food Excellent nesting, poor food

Rangeland condition class, dominant types of plants, and their value to bobwhites.

From Beef, Brush and Bobwhites, Fernandez and Guthery.

“ It is important to understand that the structural elements

• f habitat (height, density, distribution) of herbaceous and

woody vegetation are what largely drive bobwhite abundance.” Brennan, NBCI 2.0

Bobwhite Habitat Components

Lack any one and you don’t have bobwhite habitat!

• Nesting Habitat
• Basketball-sized clumps of bunchgrass, 10-20%

taller than other grasses, found at random.

• Minimum 300 clumps, optimal density 600 – 700 clumps/ acre.
• Brood Habitat
• Rich in insects on or near ground.
• Numerous patches of, or contiguous bare ground.
• Overhead screening cover – predator avoidance.
• Escape – Loafing Habitat (Protective Cover)
• S

hrubs or stiff stemmed forbs 3 – 10 feet tall, minimum 5 ft. canopy diameter – loafing; 20 ft. canopy diameter - escape.

• Ideally 10 – 30%
• f landscape.

Some Basic Considerations

• Nest predation increases with increased removal of vegetation.
• Nest trampling not significant at 0.25 – 1.0 AU/ acre.
• Odds of nest trampling increase over time.
• Utilization < 65%

has minimal effect on nesting passerines. Bobwhites: (NBCI CIP habitat classification key)

• Vegetation height > 8” > 50%
• f the year.
• 25 – 75%

bare ground.

• Protective cover within 164 ft. (50 m.)

Other considerations:

• Bobwhites nest April – S

eptember.

• Bobwhites need 40 – 45 days to complete nesting cycle.
• Needs to be profitable for the cattleman.
• High intensity-short duration grazing systems build soil health, increase

grass vigor and promote greater biodiversity.

NestiNg cover

NBCI 2.0

Bobwhite Population Trend 1966-2006

Landscape Scale

• Minimum 25%
• f landscape

consisting of bobwhite habitat, with;

• Minimum 1,500 acres bobwhite

habitat.

Landscape Context

“ There was a threshold of approximately 40% forest cover within

250 m (≈ 275 yds.) of a field, below which the probability of

• ccupancy for eastern meadowlark, grasshopper sparrow, northern

bobwhite, and red-winged blackbird declined.”

Landscape Context

Jef Hodges j hodge34@ utk.edu

Why Grazing for Bobwhite Habitat?

Focus Area Pilots

2 4 6 2009 2010 2011 2012 2013 2014 2015

IA Mean Covey’s per Point

Focal Area 5 4 4 7 8 16 18 16 2006 2007 2008 2009 2010 2011 2012 2013 2014

Indian Creek, SC Fall Covey Count

# Coveys Linear (# Coveys)