Editing Cuckoo (section)

=== Migration ===
[[File:Chestnut-winged Cuckoo in Singapore, Dec 2012, by William Lee.jpg|thumb|A [[chestnut-winged cuckoo]] in Singapore <!-- Is this a migratory species?  If so, clarify for the reader -->]]

Most species of cuckoo are sedentary, but some undertake regular seasonal [[bird migration|migrations]], and others undertake partial migrations over part of their range.

Species breeding at higher latitudes migrate to warmer climates during the winter due to food availability. The [[long-tailed cuckoo|long-tailed koel]], which breeds in New Zealand, flies to its wintering grounds in Polynesia, Micronesia, and Melanesia, a feat described as "perhaps the most remarkable overwater migration of any land bird."<ref>{{cite journal | last1 = Ellis | first1 = D | last2 = Kepler | first2 = C | last3 = Kepler | first3 = A | last4 = Teebaki | first4 = K | year = 1990 | title = Occurrence of the Longtailed Cuckoo ''Eudynamis taitensis'' on Caroline Atoll, Kiribati | url = http://www.publish.csiro.au/?act=view_file&file_id=MU9900202.pdf | journal = Emu | volume = 90 | issue = 3| page = 202 | doi=10.1071/mu9900202| bibcode = 1990EmuAO..90..202E }}</ref> The yellow-billed cuckoo and black-billed cuckoo breed in North America and fly across the [[Caribbean Sea]], a nonstop flight of {{convert|4000|km|abbr=on}}. Other long migration flights include the [[lesser cuckoo]], which flies from Africa to [[India]], and the common cuckoo of Europe, which flies nonstop over the Mediterranean Sea and [[Sahara Desert]] on the voyage between Europe and central Africa.<ref name="BTO">[http://www.bto.org/science/migration/tracking-studies/cuckoo-tracking BTO Cuckoo migration tracking study]</ref>

Within Africa, 10 species make regular intracontinental migrations that are described as polarised. That is, they spend the nonbreeding season in the tropical centre of Africa and move north and south to breed in the more arid and open savannah and deserts.<ref>{{cite journal | last1 = Hockey | first1 = P | year = 2000 | title = Patterns and Correlates of Bird Migrations in Sub-Saharan Africa | journal = Emu | volume = 100 | issue = 5| pages = 401–17 | doi = 10.1071/MU0006S | bibcode = 2000EmuAO.100..401H | s2cid = 89071968 }}</ref> This is the same as the situation in the Neotropics, where no species have this migration pattern, or tropical Asia, where a single species does. About 83% of the Australian species are partial migrants within Australia or travel to [[New Guinea]] and [[Indonesia]] after the breeding season.<ref>{{cite journal | last1 = Chan | first1 = K | year = 2001 | title = Partial migration in Australian landbirds: a review | journal = Emu | volume = 101 | issue = 4| pages = 281–92 | doi = 10.1071/MU00034 | bibcode = 2001EmuAO.101..281C | s2cid = 82259620 }}</ref>

In some species, the migration is [[Diurnality|diurnal]], as in the [[channel-billed cuckoo]], or [[nocturnal]], as in the [[yellow-billed cuckoo]].