https://www.allaboutbirds.org/guide/Cactus_Wren/photo-gallery/304481991
抄一下：
- Most birds only build nests during the breeding season and use them just for rearing their young, but male and female Cactus Wrens build multiple nests and use them as roosting sites even during the nonbreeding season.
- Juvenile Cactus Wrens start building nests early in life. They imitate their parents by picking up nesting material as soon as 12 days after leaving the nest, but they don’t actually build their own nest until they’ve been out of the nest for about 63 days.
- Adults often feed their nestlings grasshoppers, being careful to pluck off the wings before stuffing the insect into the chicks' mouths. The parents need to pluck a lot of grasshopper wings; one nestling needs to eat at least 14 grasshoppers a day to meet its nutritional requirements.
- The Cactus Wren destroys the nests of other bird species, pecking or removing their eggs, and can lower the breeding density of Verdins (another desert bird).
- Cold desert nights may have more of an impact on the success of Cactus Wren breeding than extremely hot daytime temperature.
- Cactus Wrens rarely drink water. Instead they get all their liquids from juicy insects and fruit.
- The Cactus Wren is the state bird of Arizona.
- The Cactus Wren is an active mobber of nest predators. A pair was observed attacking a Yuma antelope squirrel so vigorously that the squirrel became impaled on the thorns of a cactus. The wrens continued to peck the squirrel until it was knocked to the ground where it escaped.
- Before heading back to the nest for the night, many Cactus Wrens take a dust bath. Several species also take dust baths to help reduce feather parasites and keep feathers looking good.
- The oldest recorded Cactus Wren was a male, and at least 8 years, 1 month old when it was identified in 2013 in California by a leg band. It was banded in the same state in 2006.
