Supposedly the ones that are football shaped are built by cactus wrens. He builds one for her; she lays the eggs and waits; he goes and builds another so she has a choice as to where to raise the little ones. He will continue to build nests ... and they are serial movers ....
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Supposedly the ones that are football shaped are built by cactus wrens. He builds one for her; she lays the eggs and waits; he goes and builds another so she has a choice as to where to raise the little ones. He will continue to build nests ... and they are serial movers ....
— Margaret Hovell