Tree swallows are now nesting up to two weeks earlier than they did in the 1970s, a shift attributed to rising temperatures associated with climate change.
However, the occurrence of early spring cold snaps can adversely affect the growth and survival rates of nestlings, presenting a critical risk to their development.
This study underscores the resilience of certain tree swallows, which may adapt to these environmental challenges, but highlights the ongoing risks posed by climate variability.