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Atlantic blue marlin reach sexual maturity at the age of two to four years. Males reach sexual maturity at a weight of 35–44 kg (77–97 lb) and females at 47–61 kg (104–134 lb). [ 26 ] Blue marlin breed in late summer and fall.
The female and immature are brownish-gray to dark brown above, and whitish buff spotted with brown below. Besides a weak whitish supercilium and the faint dark malar stripe—which are barely recognizable in both the palest and the darkest birds—the face of the merlin is less strongly patterned than in most other falcons.
Makaira nigricans Lacepède, 1802 (Atlantic blue marlin); Makaira mazara (Jordan & Snyder, 1901) (Indo-Pacific blue marlin); Although they are traditionally listed as separate species, recent research indicates that the Atlantic blue marlin (Makaira nigricans) and Indo-Pacific blue marlin (Makaira mazara) may be parapatric populations of the same species.
“Start by learning just two or three songs of birds you can see,” says Dr. Webster. “Then, move forward by adding one call at a time.” “Then, move forward by adding one call at a time.”
A few days before Halloween, data collectors at the Jekyll Island Banding Station (JIBS) observe a steady, yet predictable, decline of birds in nets, signaling the end of migration.
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Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply birdsong ) are the bird sounds that are melodious to the human ear. In ornithology and birding , songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).
The brown thrasher is the state bird of Georgia. This list of birds of Georgia includes species documented in the U.S. state of Georgia and accepted by the Checklist and Records Committee of the Georgia Ornithological Society (GOSRC). As of August 2020, there are 427 species definitively included in the official list.