Blue-crowned manakin

Eight subspecies are recognised.[6]

With the exception of L. c. carbonata, the subspecies categories listed above are not supported phylogenetically. They were instead named based on differences in male plumage. Blue-crowned manakins differ genetically into six clades based on geographic location: trans-Andean, Venezuela, North Amazon, Napo-Marañon, Central Peru, and South Peru/Bolivia. Interestingly, birds of highly different plumage fall into the same clades. For example,  L. c. exquisita, which has green plumage males, and L. c. coronata, which has completely black colored males, both fall into the Central Peru clade.[8]

Blue-crowned manakins vary genetically based on geographic location. Physical boundaries, such as large Amazonian rivers and the Andes Mountains, tend to separate genetically distinct blue-crowned manakins. The uplift of the Andes Mountains seem to be the first major source of separation between blue-crowned manakin populations followed by the establishment of Amazonian rivers. The Amazon River separates North and South Amazonian clades and the Napo River separates the North Amazon and Napo-Marañon clades. Large rivers present a barrier to Blue-crowned manakins despite being flighted because they prefer the understory of terra firme (non-flooded) forests. Central Peru and South Peru/Bolivia clades and Venezuela and Amazonia clades are not separated by a geographic barrier. It is likely that they instead historically separated and evolved separately for a period of time.[8]

The blue-crowned manakin's contact call is a swee sound. It is used by blue-crowned manakins of all ages and sex. Males will use it while perching on their song perch, while interacting with other blue-crowned manakins, and while performing some of their display behaviors. Females and fledglings use a soft swee sound during foraging. Adult females will also use this call when visiting a territorial male. Their contact call can be a single note or in bouts of a varying number of repetitions. It is a high pitch note that increases in pitch from 2.8 to 5.7 kHz. Territorial males use an advertisement call that sounds like chi-wrr. It can be a single note or 3-5 repetitions. This call is composed of three parts. First, a lower pitched swee sound of 3–5 kHz. Second, a short descending note of three stacked harmonics or 1.4, 2.8, and 4.8 kHz. Third, a harsh note of two harmonics of 2.0 and 3.9 kHz. Males make a preew call when interacting with males and females in their territory. It is composed of 4-5 rapid oscillations between 3.1 and 6 kHz. During display, males make a pee call of 1-10 repetitions. It consists of both flat notes and harmonics between 1.5 and 15 kHz.[14]

Breeding season coincides with the dry season (late November to early April).[12] Males are known to display alone or form leks of up to seven males. Adult and juvenile males form territories though juveniles are unable to maintain their own territory.[14] Their territories range from 206 to 5045 m² in size.[12] They defend their territory and attract mates through song. They perform their songs on song perches that are horizontal or slightly angled twigs and will sing between 6am and 5pm. Their display courts are 3–5 m in diameter and are located close to the ground in the open understory. They use up to two courts at a time, but courts can change location annually. Their courtship displays are somewhat complex with a total of 11 behaviors, 6 of which are aerial.[14] Female's home ranges average 4 ha in size and overlap with one lek on average.[12]

Blue-crowned manakin nest placed in a horizontally forked branch with one egg.

Blue-crowned manakins make simple, open-cup nests using dry palm, dry leaves, and/or bark externally. The internal lining of their nest is pale brown, but can also be whitish or yellow. They use spider webs to secure their nests to the tree.[15] They chose small shrubs and treelets that are less than 1 meter tall and place their nests on horizontal forks.[15][16] They typically nest in Rudgea spp., Ixora killipii, R. viridifoliax, and R. lindenicana along small ravines.[15] Females are the sole nest builders and take care of their offspring alone. They lay two eggs per clutch. Their nests experience high predation rates. To help mitigate this risk, Blue-crowned manakins choose nesting sites away from wire-tailed manakins, a species that favors similar nesting environments. This reduces the number of birds nesting in one area and thus reduces the chance that predators will predate the area.[16]

Blue-crowned manakins are frugivores. Their diet includes fruit from Melastomataceae, Moraceae, Bromeliaceae, and Araceae.[17]

When feeding in a mixed flock, blue-crowned manakins tend to flock with cinereus and dusty-throated antshrikes, and the white-flanked, Yasuni, long-winged, gray, and rufous-tailed stipplethroats. These flocks are typically only composed of one or two blue-crowned manakins. When there are two blue-crowned manakins in a flock, they forage independently from one another. Their behavior is never aggressive toward other species of birds in the flock. Both males and females forage in mixed flocks, but females spend more time on average in the flock. They forage in the understory between a height of 2–7 m. Their preferred food while in flocks are arthropods, including ants, flies, and other small insects. While catching arthropods, their hunting technique was often a sally-strike or sally-glean off of live foliage. Considering their normally frugivorous diet, it is speculated that the blue-crowned manakins are taking advantage of the flock's ability to cause insects to scatter.[18]