Ecological Archives E082-010-A2

Krista L. De Groot and James N. M. Smith. 2001. Community-wide impacts of a generalist brood parasite, the Brown-headed Cowbird (Molothrus ater).  Ecology 82: 868-881.

Appendix B. Summary of nests monitored in Removal and Control sites (see species names in Appendix A).  Number on the right is total number of nests.  Number on the left refers to number of nests parasitized (column P) or number of nests successful (column S).


 

1996

1997
 

Removal

Control 

5-10 km

Removal

Control 

5-10 km

Control

> 10 km
Suitable hosts

P

S

P

S

P

S

P

S

P

S
Hermit Thrush

0/3

0/3

0/2

2/2

0/8

4/8

5/6

1/6

4/6

3/6
Field Sparrow

0/3

1/3

---

---

0/3

1/3

---

---

0/1

1/1
Vesper Sparrow

0/1

1/1

---

---

0/9

5/9

0/5

5/5

0/3

2/3
Clay-colored Sparrow

0/1

1/1

---

---

---

---

---

---

---

---
Lincoln Sparrow

0/1

0/1

0/1

0/1

0/1

1/1

0/2

2/2

0/1

0/1
Chipping Sparrow

---

---

0/1

1/1

0/5

1/5

0/3

1/3

0/4

3/4
Song Sparrow

---

---

---

---

---

---

1/1

1/1

0/2

2/2
Nashville Warbler

---

---

0/2

1/2

---

---

---

---

---

---
Red-eyed Vireo

0/1

1/1

0/1

1/1

---

---

---

---

---

---
Indigo Bunting

0/1

x

---

---

---

---

---

---

---

---
Eastern Wood Peewee

0/1

x

---

---

---

---

---

---

---

---
Ovenbird

---

---

0/3

3/3

0/1

1/1

0/1

0/1

1/1

1/1
Rose-breasted Grosbeak

---

---

0/1

1/1

---

---

0/3

2/3

---

---
Eastern Towhee

---

---

---

---

0/1

0/1

---

---

0/1

1/1
Yellow-rumped Warbler

---

---

---

---

---

---

0/1

0/1

---

---
Veery

---

---

---

---

---

---

0/1

1/1

---

---
Common Yellowthroat

---

---

---

---

---

---

---

---

0/1

1/1
Unsuitable hosts
Blue Jay

x

1/1

---

---

x

2/3

x

4/5
American Robin

---

---

x

1/2

x

1/1

x

2/4

x

0/1
Cedar Waxwing

---

---

x

1/2

---

---

---

---
Eastern Bluebird

---

---

x

1/1

---

---

---

---
Brown Thrasher

---

---

x

1/1

x

4/5

x

1/1

x

2/2
Black-capped Chickadee

---

---

---

---

x

1/1

---

---
Eastern Kingbird

---

---

---

---

---

---

---

---

x

0/1
Other
Common Nighthawk

x

1/2

---

---

x

0/1

---

---

x

2/2
Whip-poor-will

x

0/1

---

---

---

---

---

---

---

---

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