Join sound recordist Greg Budney in our Video of the Week and learn about one of the first sounds of spring: the wonderful whistled song of the Northern Cardinal. Both male and female cardinals sing, and their songs bringing a cheerful sound to the gray days of late winter and early spring. | Cornell Lab of Ornithology

Since we are getting into the mating season, we will also start getting calls on birds attacking windows. Normally it is robins and cardinals, but any bird might do it. Usually it's the males seeing their reflection and attacking the rival they see! They don't usually hurt themselves in the process, but it can occasionally happen. More often though it is just really annoying to the person experiencing it. We get so many calls from people being driven crazy by a cardinal who has been throwing its

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