Respuesta :
The male will chase away any intruding males of his species due of the set action pattern based on the sign stimulation of a red belly. By driving away such males, the defender reduces the likelihood of another male fertilising eggs put in his nesting region.
How is bird behaviour influenced?
Sun-azimuth orientation has been experimentally established in Starlings Sturnus vulgaris, Meadow Larks Sturnella magna, Barred Warblers Sylvia nisoria, Red-backed Shrikes Lanius collurio, and homing pigeons. Sun-azimuth orientation is the capacity to determine compass directions based on the sun's location regardless of time of day, and hence primarily on the ability to adjust for the sun's daily azimuth displacement. The evidence demonstrating the innateness of the underlying process is insufficient, although it is intriguing.
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