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The roadrunner is about 52–62 cm (20–24 in) long, has a 43–61 cm (17–24 in) wingspan and weighs 221–538 g (7.8–19.0 oz). It stands around 25–30 cm (9.8–12 in) tall and is the largest North American cuckoo. The adult has a bushy crest and long thick dark bill. It has a long dark tail, a dark head and back, and is blue on the front of the neck and on the belly. Roadrunners have four toes on each zygodactyl foot; two face forward, and two face backward.