What observation suggests a mason bee cell failed to hatch the following spring?
Answer
The original mud plug sealing the cell remains intact
If the original mud plug sealing the cell is still present the next spring, it typically indicates that the developing cocoon failed to emerge, possibly due to environmental issues or parasitism.

Related Questions
To which specific family do mason bees belong?How do mason bees primarily carry pollen?What material gives the mason bee its common name based on nest construction?Which statement accurately describes the social organization of mason bees?What is the typical nesting habit of mason bees?What key foraging behavior contributes to mason bee pollination efficiency?What primary building material distinguishes mason bees from leafcutter bees?Regarding per-visit efficiency for certain fruit trees, how do mason bees compare to honey bees?Why is annual cleaning of nesting tubes recommended for mason bee management?What observation suggests a mason bee cell failed to hatch the following spring?What characteristic allows mason bees to start work on early-blooming fruit trees sooner than honey bees?