The willow flycatcher and the least flycatcher are similar in appearance, and in many regions of the united states, their ranges overlap. the two organisms do not interbreed. based on this information, willow flycatchers and least flycatchers are

They are sympatric species. They occupy the same habitat but do not interbreed probably because they are reproductively isolated or practice behavioral isolation. To avoid extinction through interspecific competition, the two species probably practice resource partitioning (differences in how species use resources).

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

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