When given a large entrance hole, House Wrens
tend to build a sufficiently substantial barrier that we have not observed a cowbird egg in a House Wren
nest (see also Pribil and Picman 1997).
Southern House Wren
females laid eggs measuring 17.
are secondary-cavity nesters and may destroy nests to gain nest sites (Quinn and Holroyd 1989, Pribil and Picman 1991), although they also destroy eggs and nestlings in open-cup nests (Belles-Isles and Picman 1986).
Underwood, Kutztown University, "Aging House Wren
nestlings based on feather tract development, wing chord, and head length.
2000), and probably House Wren
and Gray Catbird (this study).
had a significant positive effect for mugwort cover at Sacramento sites but an apparently negative effect (P = 0.
How males in the House Wren
, a cavity-nesting songbird, discover that eggs have hatched and transition to provisioning nestlings.
Box use and nest fates were analyzed to provide information on (a) House Wren
nesting behavior in a suburban wetland, and (b) on the suitability of milk-carton nest boxes in this setting.
Red-bellied Woodpecker predation on nestling House Wrens
but seven (Turkey Vulture, House Wren
, Blue-gray Gnatcatcher, Gray Catbird, Yellow-rumped Warbler, Palm Warbler, and Common Yellowthroat).
One problem is that a male house wren
will fill every box in his territory with sticks to keep other birds away.
The process and causes of fledging in a cavity-nesting passerine bird, the House Wren
Overall, females that responded more aggressively to the House Wren
tended to have larger FIDs (i.
Red-Winged Blackbird Ruby-Throated Hummingbird Scarlet Tanager Purple Martin House Wren
Indigo Bunting Cedar Waxwing Bluebird Bald Eagle Brown Pelican
The best bug-eaters are the bushtit and the house wren
, he said.