Dying without wings
Natalie CooperTrinity College Dublin
@nhcooper123
…in this world nothing can be
said to be certain, except
death and taxes…
Benjamin Franklin@benfranklin
There is great variation in the
lifespans of living things…
How can we explain this variation?
log(Lifespan) = log(a) +blog(Body
mass)
Why do some species live longer than
expected given their body size?
A quick side step into life history
theory…
Why do species have different
life history strategies?
Species with adaptations that reduce extrinsic mortality should have longer lifespans than expected given their
body mass
How can species reduce their extrinsic
mortality?
We tested our predictions on 779 mammals and 546 birds
(N = 1325)
Crepuscular species have the shortest
lifespans
Arboreal, semi-arboreal and
fossorial species have the longest
lifespans
When you’re activeWhere you’re active
Are bats really exceptional?
Be active at day or nightForage in safety
Be bigFly
Live in a burrow