Fig. 1.

An overview of data collection, life‐history timeline and the predicted influence of migration distance on birth timing. (a) Timeline of life‐history events for migratory mule deer (Odocoileus hemionus) in western Wyoming, USA and data collection schedule during the study period (2015–2019). Within a year, there is variation in the availability of capital resources (body fat; orange line) along with seasonal fluctuations in income resources (high‐quality forage; green line). (b) A conceptual diagram illustrating how migration distance may shape birth timing.