Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
1977 Walter D. Koenig
Melanerpes formicivorus
Hastings Reservation, Monterey Co. Calif.
(4 July) otherwise he was being cleaned off by the ants). There was
no trace of eggs or young; and due to decomposition
it was pretty hard to decide what, if anything, had been
eaten off the adult's body. This is neat indeed, but
unfortunately nothing can be said with certainty.
The facts are as follows
1) Bird died quite awhile ago (surely 15 days+).
2) Bird was a ♂ (unbanded); ♂♂ do spend the night
on the nest
3) Babies would have hatched ≈ 22 days ago.
The possibilities are more or less as wro follows:
1) Predator (owl?) killed incubating/brooding
adult ♂ as he was spending night on nest, ate part of
head and eggs/young. Not unreasonable given the
circumstances.
2) Bird was predated in hole after nest had
already failed (nest must have failed soon after start
of incubation?). Not too likely.
3) Bird died in hole while incubating/brooding;
other birds removed dead young, pecked dead adult.
Possible. Why, though, would a sick or dying bird try
to spend the night in the nest? Seems more likely that
he'd go off to die on his own, leaving the babies to their
own devices.
Clearly this is the best instance of possible nest
predation I've seen yet. It would be neat to be able
to pin it down further, but it's hard to get anything